Compare 81131 vs 81281
| Property | 81131 | 81281 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 811311 | 812811 |
| Prime factorization | 81131 | 81281 |
| Divisors count | 2 | 2 |
| Divisors | 1, 81131 | 1, 81281 |
| Number of properties | 4 | 7 |
| Centered decagonal primes | 61st | |
| Chen primes | 3597th | |
| Harmonic primes | 2996th | 3002nd |
| Isolated primes | 5897th | |
| Primes | 7942nd | 7953rd |
| Pythagorean primes | 3963rd | |
| Sophie germain primes | 987th | 988th |
| Twin primes (1st member) | 1025th | |
| Roman numberals | ||
| Base 2 | 100111100111010112 | 100111101100000012 |
| Base 3 | 110100212123 | 110101111023 |
| Base 4 | 1033032234 | 1033120014 |
| Base 5 | 100440115 | 101001115 |
| Base 6 | 14233356 | 14241456 |
| Base 7 | 4553517 | 4556547 |
| Base 8 | 2363538 | 2366018 |
| Base 9 | 1332559 | 1334429 |
| Base 10 | 8113110 | 8128110 |
| Base 11 | 55a5611 | 5608211 |
| Base 12 | 3ab4b12 | 3b05512 |
| Base 13 | 2ac0b13 | 2acc513 |
| Base 14 | 217d114 | 2189b14 |
| Base 15 | 1908b15 | 1913b15 |
| Base 16 | 13ceb16 | 13d8116 |