131 (number)
Encyclopedia : 1 : 13 : 131 : 131 (number)
131 is the natural number following 130 and preceding 132.
| Cardinal | One hundred [and] thirty-one |
| Ordinal | 131st |
| Factorization | prime |
| Roman numeral | CXXXI |
| Binary | 10000011 |
| Hexadecimal | 83 |
In mathematics
131 is a Sophie Germain prime, the second 3-digit palindromic prime, and also a permutable prime with 113 and 311. It can be expressed as the sum of three consecutive primes, 131 = 41 + 43 + 47. 131 is an Eisenstein prime with no imaginary part and real part of the form [3n - 1]. Because the next odd number, 133, is a semiprime, 131 is a Chen prime.In other fields
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