Compare 157 vs 331
| Property | 157 | 331 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1571 | 3311 |
| Prime factorization | 157 | 331 |
| Divisors count | 2 | 2 |
| Divisors | 1, 157 | 1, 331 |
| Number of properties | 11 | 10 |
| Additive primes | 21st | 39th |
| Chen primes | 30th | |
| Cuban primes 1 | 7th | |
| Emirps | 12th | |
| Good primes | 24th | |
| Happy primes | 17th | |
| Harmonic primes | 13th | 28th |
| Isolated primes | 14th | 28th |
| Lucky primes | 19th | |
| Primes | 37th | 67th |
| Pythagorean primes | 17th | |
| Sexy primes (1st member) | 22nd | 37th |
| Sexy primes (2nd member) | 21st | |
| Sexy prime triplets (2nd member) | 12th | |
| Super primes | 12th | 19th |
| Roman numberals | CLVII | CCCXXXI |
| Base 2 | 100111012 | 1010010112 |
| Base 3 | 122113 | 1100213 |
| Base 4 | 21314 | 110234 |
| Base 5 | 11125 | 23115 |
| Base 6 | 4216 | 13116 |
| Base 7 | 3137 | 6527 |
| Base 8 | 2358 | 5138 |
| Base 9 | 1849 | 4079 |
| Base 10 | 15710 | 33110 |
| Base 11 | 13311 | 28111 |
| Base 12 | 11112 | 23712 |
| Base 13 | c113 | 1c613 |
| Base 14 | b314 | 19914 |
| Base 15 | a715 | 17115 |
| Base 16 | 9d16 | 14b16 |