Compare 815 vs 851
| Property | 815 | 851 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 1631 | 231 × 371 |
| Prime factorization | 5 × 163 | 23 × 37 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 163, 815 | 1, 23, 37, 851 |
| Number of properties | 1 | 1 |
| Semiprimes | 247th | 257th |
| Roman numberals | DCCCXV | DCCCLI |
| Base 2 | 11001011112 | 11010100112 |
| Base 3 | 10100123 | 10111123 |
| Base 4 | 302334 | 311034 |
| Base 5 | 112305 | 114015 |
| Base 6 | 34356 | 35356 |
| Base 7 | 22437 | 23247 |
| Base 8 | 14578 | 15238 |
| Base 9 | 11059 | 11459 |
| Base 10 | 81510 | 85110 |
| Base 11 | 68111 | 70411 |
| Base 12 | 57b12 | 5ab12 |
| Base 13 | 4a913 | 50613 |
| Base 14 | 42314 | 44b14 |
| Base 15 | 39515 | 3bb15 |
| Base 16 | 32f16 | 35316 |