Compare 247 vs 253
| Property | 247 | 253 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 131 × 191 | 111 × 231 |
| Prime factorization | 13 × 19 | 11 × 23 |
| Divisors count | 4 | 4 |
| Divisors | 1, 13, 19, 247 | 1, 11, 23, 253 |
| Number of properties | 1 | 1 |
| Semiprimes | 79th | 81st |
| Roman numberals | CCXLVII | CCLIII |
| Base 2 | 111101112 | 111111012 |
| Base 3 | 1000113 | 1001013 |
| Base 4 | 33134 | 33314 |
| Base 5 | 14425 | 20035 |
| Base 6 | 10516 | 11016 |
| Base 7 | 5027 | 5117 |
| Base 8 | 3678 | 3758 |
| Base 9 | 3049 | 3119 |
| Base 10 | 24710 | 25310 |
| Base 11 | 20511 | 21011 |
| Base 12 | 18712 | 19112 |
| Base 13 | 16013 | 16613 |
| Base 14 | 13914 | 14114 |
| Base 15 | 11715 | 11d15 |
| Base 16 | f716 | fd16 |