Compare 81121 vs 81131
| Property | 81121 | 81131 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 35271 | 811311 |
| Prime factorization | 23 × 3527 | 81131 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 3527, 81121 | 1, 81131 |
| Number of properties | 1 | 4 |
| Harmonic primes | 2996th | |
| Isolated primes | 5897th | |
| Primes | 7942nd | |
| Semiprimes | 19164th | |
| Sophie germain primes | 987th | |
| Roman numberals | ||
| Base 2 | 100111100111000012 | 100111100111010112 |
| Base 3 | 110100211113 | 110100212123 |
| Base 4 | 1033032014 | 1033032234 |
| Base 5 | 100434415 | 100440115 |
| Base 6 | 14233216 | 14233356 |
| Base 7 | 4553357 | 4553517 |
| Base 8 | 2363418 | 2363538 |
| Base 9 | 1332449 | 1332559 |
| Base 10 | 8112110 | 8113110 |
| Base 11 | 55a4711 | 55a5611 |
| Base 12 | 3ab4112 | 3ab4b12 |
| Base 13 | 2ac0113 | 2ac0b13 |
| Base 14 | 217c514 | 217d114 |
| Base 15 | 1908115 | 1908b15 |
| Base 16 | 13ce116 | 13ceb16 |