Compare 813 vs 815
| Property | 813 | 815 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 2711 | 51 × 1631 |
| Prime factorization | 3 × 271 | 5 × 163 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 271, 813 | 1, 5, 163, 815 |
| Number of properties | 1 | 1 |
| Semiprimes | 246th | 247th |
| Roman numberals | DCCCXIII | DCCCXV |
| Base 2 | 11001011012 | 11001011112 |
| Base 3 | 10100103 | 10100123 |
| Base 4 | 302314 | 302334 |
| Base 5 | 112235 | 112305 |
| Base 6 | 34336 | 34356 |
| Base 7 | 22417 | 22437 |
| Base 8 | 14558 | 14578 |
| Base 9 | 11039 | 11059 |
| Base 10 | 81310 | 81510 |
| Base 11 | 67a11 | 68111 |
| Base 12 | 57912 | 57b12 |
| Base 13 | 4a713 | 4a913 |
| Base 14 | 42114 | 42314 |
| Base 15 | 39315 | 39515 |
| Base 16 | 32d16 | 32f16 |