Compare 253 vs 287
| Property | 253 | 287 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 231 | 71 × 411 |
| Prime factorization | 11 × 23 | 7 × 41 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 23, 253 | 1, 7, 41, 287 |
| Number of properties | 1 | 1 |
| Semiprimes | 81st | 89th |
| Roman numberals | CCLIII | CCLXXXVII |
| Base 2 | 111111012 | 1000111112 |
| Base 3 | 1001013 | 1011223 |
| Base 4 | 33314 | 101334 |
| Base 5 | 20035 | 21225 |
| Base 6 | 11016 | 11556 |
| Base 7 | 5117 | 5607 |
| Base 8 | 3758 | 4378 |
| Base 9 | 3119 | 3489 |
| Base 10 | 25310 | 28710 |
| Base 11 | 21011 | 24111 |
| Base 12 | 19112 | 1bb12 |
| Base 13 | 16613 | 19113 |
| Base 14 | 14114 | 16714 |
| Base 15 | 11d15 | 14215 |
| Base 16 | fd16 | 11f16 |