223 (number)
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← 220 221 222 223 224 225 226 227 228 229 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 → | ||||
| Cardinal | two hundred twenty-three | |||
| Ordinal | 223rd (two hundred twenty-third) | |||
| Factorization | prime | |||
| Prime | Yes | |||
| Greek numeral | ΣΚΓ´ | |||
| Roman numeral | CCXXIII | |||
| Binary | 110111112 | |||
| Ternary | 220213 | |||
| Quaternary | 31334 | |||
| Quinary | 13435 | |||
| Senary | 10116 | |||
| Octal | 3378 | |||
| Duodecimal | 16712 | |||
| Hexadecimal | DF16 | |||
| Vigesimal | B320 | |||
| Base 36 | 6736 | |||
223 (two hundred [and] twenty-three) is the natural number between 222 and 224.
223 is a prime number.[1] It is the smallest prime for which the two nearest primes on either side of it are 16 units apart.[2] Among the 720 permutations of the numbers from 1 to 6, exactly 223 of them have the property that at least one of the numbers is fixed in place by the permutation and the numbers less than it and greater than it are separately permuted among themselves.[3]
In connection with Waring's problem, 223 requires the maximum number of terms (37 terms) when expressed as a sum of positive fifth powers, and is the only number that requires that many terms.[4]
In other fields
.223 Remington and .223 WSSM, firearm cartridges- The years 223 and 223 BC
- The number of synodic months of a Saros.
References
^ Sloane, N. J. A. (ed.). "Sequence A000040 (The prime numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ Sloane, N. J. A. (ed.). "Sequence A046931 (Prime islands)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^ Sloane, N. J. A. (ed.). "Sequence A006932 (Number of permutations of [n] with at least one strong fixed point)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^ Sloane, N. J. A. (ed.). "Sequence A048267 (Largest integer requiring n fifth powers to sum to it, starting with n=28)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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