Compare 51 vs 87
| Property | 51 | 87 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 171 | 31 × 291 |
| Prime factorization | 3 × 17 | 3 × 29 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 17, 51 | 1, 3, 29, 87 |
| Number of properties | 1 | 1 |
| Semiprimes | 18th | 30th |
| Roman numberals | LI | LXXXVII |
| Base 2 | 1100112 | 10101112 |
| Base 3 | 12203 | 100203 |
| Base 4 | 3034 | 11134 |
| Base 5 | 2015 | 3225 |
| Base 6 | 1236 | 2236 |
| Base 7 | 1027 | 1537 |
| Base 8 | 638 | 1278 |
| Base 9 | 569 | 1069 |
| Base 10 | 5110 | 8710 |
| Base 11 | 4711 | 7a11 |
| Base 12 | 4312 | 7312 |
| Base 13 | 3c13 | 6913 |
| Base 14 | 3914 | 6314 |
| Base 15 | 3615 | 5c15 |
| Base 16 | 3316 | 5716 |