Compare 51 vs 65
| Property | 51 | 65 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 171 | 51 × 131 |
| Prime factorization | 3 × 17 | 5 × 13 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 17, 51 | 1, 5, 13, 65 |
| Number of properties | 1 | 1 |
| Semiprimes | 18th | 23rd |
| Roman numberals | LI | LXV |
| Base 2 | 1100112 | 10000012 |
| Base 3 | 12203 | 21023 |
| Base 4 | 3034 | 10014 |
| Base 5 | 2015 | 2305 |
| Base 6 | 1236 | 1456 |
| Base 7 | 1027 | 1227 |
| Base 8 | 638 | 1018 |
| Base 9 | 569 | 729 |
| Base 10 | 5110 | 6510 |
| Base 11 | 4711 | 5a11 |
| Base 12 | 4312 | 5512 |
| Base 13 | 3c13 | 5013 |
| Base 14 | 3914 | 4914 |
| Base 15 | 3615 | 4515 |
| Base 16 | 3316 | 4116 |