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227 (number)

From Wikipedia, the free encyclopedia
Natural number
← 226227 228 →
Cardinaltwo hundred twenty-seven
Ordinal227th
(two hundred twenty-seventh)
Factorizationprime
Primeyes
Greek numeralΣΚΖ´
Roman numeralCCXXVII,ccxxvii
Binary111000112
Ternary221023
Senary10156
Octal3438
Duodecimal16B12
HexadecimalE316

227 (two hundred [and] twenty-seven) is the natural number following226 and preceding228. It is also aprime number.

In mathematics

[edit]

227 is atwin prime, and the start of aprime triplet.[1] 227 is asafe prime, aregular prime,[2] aPillai prime,[3] aStern prime,[4] and aRamanujan prime.[5]

References

[edit]
  1. ^Sloane, N. J. A. (ed.)."Sequence A022004 (Initial members of prime triples (p, p+2, p+6))".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^Sloane, N. J. A. (ed.)."Sequence A007703 (Regular primes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^Sloane, N. J. A. (ed.)."Sequence A063980 (Pillai primes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^Sloane, N. J. A. (ed.)."Sequence A042978 (Stern primes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^Sloane, N. J. A. (ed.)."Sequence A104272 (Ramanujan primes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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