Compare 81551 vs 81557
| Property | 81551 | 81557 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 815511 | 71 × 611 × 1911 |
| Prime factorization | 81551 | 7 × 61 × 191 |
| Divisors count | 2 | 8 |
| Divisors | 1, 81551 | 1, 7, 61, 191, 427, 1337, 11651, 81557 |
| Number of properties | 6 | 0 |
| Chen primes | 3601st | |
| Cousin primes (2nd member) | 1029th | |
| Primes | 7976th | |
| Prime triplets (2nd member) | 431st | |
| Twin primes (1st member) | 1027th | |
| Ulam primes | 582nd | |
| Roman numberals | ||
| Base 2 | 100111110100011112 | 100111110100101012 |
| Base 3 | 110102121023 | 110102121223 |
| Base 4 | 1033220334 | 1033221114 |
| Base 5 | 101022015 | 101022125 |
| Base 6 | 14253156 | 14253256 |
| Base 7 | 4565217 | 4565307 |
| Base 8 | 2372178 | 2372258 |
| Base 9 | 1337729 | 1337789 |
| Base 10 | 8155110 | 8155710 |
| Base 11 | 562a811 | 5630311 |
| Base 12 | 3b23b12 | 3b24512 |
| Base 13 | 2b17213 | 2b17813 |
| Base 14 | 21a1114 | 21a1714 |
| Base 15 | 1926b15 | 1927215 |
| Base 16 | 13e8f16 | 13e9516 |