Compare 1951 vs 1963
| Property | 1951 | 1963 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 19511 | 131 × 1511 |
| Prime factorization | 1951 | 13 × 151 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1951 | 1, 13, 151, 1963 |
| Number of properties | 3 | 1 |
| Cuban primes 1 | 14th | |
| Primes | 297th | |
| Semiprimes | 567th | |
| Twin primes (2nd member) | 60th | |
| Roman numberals | MCMLI | MCMLXIII |
| Base 2 | 111100111112 | 111101010112 |
| Base 3 | 22000213 | 22002013 |
| Base 4 | 1321334 | 1322234 |
| Base 5 | 303015 | 303235 |
| Base 6 | 130116 | 130316 |
| Base 7 | 54557 | 55037 |
| Base 8 | 36378 | 36538 |
| Base 9 | 26079 | 26219 |
| Base 10 | 195110 | 196310 |
| Base 11 | 151411 | 152511 |
| Base 12 | 116712 | 117712 |
| Base 13 | b7113 | b8013 |
| Base 14 | 9d514 | a0314 |
| Base 15 | 8a115 | 8ad15 |
| Base 16 | 79f16 | 7ab16 |