Compare 1657 vs 2131
| Property | 1657 | 2131 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 16571 | 21311 |
| Prime factorization | 1657 | 2131 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1657 | 1, 2131 |
| Number of properties | 8 | 5 |
| Additive primes | 139th | 168th |
| Cuban primes 1 | 12th | |
| Emirps | 80th | |
| Isolated primes | 157th | |
| Primes | 260th | 321st |
| Pythagorean primes | 125th | |
| Sexy primes (1st member) | 112th | 134th |
| Sexy prime triplets (1st member) | 43rd | 51st |
| Twin primes (2nd member) | 66th | |
| Roman numberals | MDCLVII | MMCXXXI |
| Base 2 | 110011110012 | 1000010100112 |
| Base 3 | 20211013 | 22202213 |
| Base 4 | 1213214 | 2011034 |
| Base 5 | 231125 | 320115 |
| Base 6 | 114016 | 135116 |
| Base 7 | 45557 | 61337 |
| Base 8 | 31718 | 41238 |
| Base 9 | 22419 | 28279 |
| Base 10 | 165710 | 213110 |
| Base 11 | 127711 | 166811 |
| Base 12 | b6112 | 129712 |
| Base 13 | 9a613 | c7c13 |
| Base 14 | 86514 | ac314 |
| Base 15 | 75715 | 97115 |
| Base 16 | 67916 | 85316 |