Compare 157 vs 158
| Property | 157 | 158 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1571 | 21 × 791 |
| Prime factorization | 157 | 2 × 79 |
| Divisors count | 2 | 4 |
| Divisors | 1, 157 | 1, 2, 79, 158 |
| Number of properties | 11 | 1 |
| Additive primes | 21st | |
| Chen primes | 30th | |
| Emirps | 12th | |
| Harmonic primes | 13th | |
| Isolated primes | 14th | |
| Primes | 37th | |
| Pythagorean primes | 17th | |
| Semiprimes | 52nd | |
| Sexy primes (1st member) | 22nd | |
| Sexy primes (2nd member) | 21st | |
| Sexy prime triplets (2nd member) | 12th | |
| Super primes | 12th | |
| Roman numberals | CLVII | CLVIII |
| Base 2 | 100111012 | 100111102 |
| Base 3 | 122113 | 122123 |
| Base 4 | 21314 | 21324 |
| Base 5 | 11125 | 11135 |
| Base 6 | 4216 | 4226 |
| Base 7 | 3137 | 3147 |
| Base 8 | 2358 | 2368 |
| Base 9 | 1849 | 1859 |
| Base 10 | 15710 | 15810 |
| Base 11 | 13311 | 13411 |
| Base 12 | 11112 | 11212 |
| Base 13 | c113 | c213 |
| Base 14 | b314 | b414 |
| Base 15 | a715 | a815 |
| Base 16 | 9d16 | 9e16 |