157 (number)
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| Cardinal | One hundred [and] fifty-seven |
| Ordinal | 157th |
| Factorization | prime |
| Roman numeral | CLVII |
| Binary | 10011101 |
| Hexadecimal | 9D |
157 is the number equal to 100 + 50 + 7, following 156 and preceding 158.
It is a prime number. The next prime is 163 and the previous prime is 151, with which 157 comprises a sexy prime triplet. Taking the arithmetic mean of those primes yields 157, thus it is a balanced prime.
In base 10, 1572 is 24649. 1582 is 24964, which uses the same digits as the previous square. 157 is the largest known number with a square that relates in this way to the square of the next integer.
157 is a repdigit in base 12 (111).
[edit] Uses
- The year 157
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