Compare 81157 vs 81166
| Property | 81157 | 81166 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 811571 | 21 × 405831 |
| Prime factorization | 81157 | 2 × 40583 |
| Divisors count | 2 | 4 |
| Divisors | 1, 81157 | 1, 2, 40583, 81166 |
| Number of properties | 6 | 1 |
| Harmonic primes | 2997th | |
| Isolated primes | 5898th | |
| Lucky primes | 1070th | |
| Primes | 7943rd | |
| Pythagorean primes | 3958th | |
| Semiprimes | 19175th | |
| Sexy primes (1st member) | 2065th | |
| Roman numberals | ||
| Base 2 | 100111101000001012 | 100111101000011102 |
| Base 3 | 110100222113 | 110101000113 |
| Base 4 | 1033100114 | 1033100324 |
| Base 5 | 100441125 | 100441315 |
| Base 6 | 14234216 | 14234346 |
| Base 7 | 4554167 | 4554317 |
| Base 8 | 2364058 | 2364168 |
| Base 9 | 1332849 | 1333049 |
| Base 10 | 8115710 | 8116610 |
| Base 11 | 55a7a11 | 55a8811 |
| Base 12 | 3ab7112 | 3ab7a12 |
| Base 13 | 2ac2b13 | 2ac3713 |
| Base 14 | 2180d14 | 2181814 |
| Base 15 | 190a715 | 190b115 |
| Base 16 | 13d0516 | 13d0e16 |