Compare 81551 vs 81561
| Property | 81551 | 81561 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 815511 | 31 × 311 × 8771 |
| Prime factorization | 81551 | 3 × 31 × 877 |
| Divisors count | 2 | 8 |
| Divisors | 1, 81551 | 1, 3, 31, 93, 877, 2631, 27187, 81561 |
| 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 | 100111110100110012 |
| Base 3 | 110102121023 | 110102122103 |
| Base 4 | 1033220334 | 1033221214 |
| Base 5 | 101022015 | 101022215 |
| Base 6 | 14253156 | 14253336 |
| Base 7 | 4565217 | 4565347 |
| Base 8 | 2372178 | 2372318 |
| Base 9 | 1337729 | 1337839 |
| Base 10 | 8155110 | 8156110 |
| Base 11 | 562a811 | 5630711 |
| Base 12 | 3b23b12 | 3b24912 |
| Base 13 | 2b17213 | 2b17c13 |
| Base 14 | 21a1114 | 21a1b14 |
| Base 15 | 1926b15 | 1927615 |
| Base 16 | 13e8f16 | 13e9916 |