Compare 1851 vs 1891
| Property | 1851 | 1891 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 6171 | 311 × 611 |
| Prime factorization | 3 × 617 | 31 × 61 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 617, 1851 | 1, 31, 61, 1891 |
| Number of properties | 1 | 1 |
| Semiprimes | 534th | 542nd |
| Roman numberals | MDCCCLI | MDCCCXCI |
| Base 2 | 111001110112 | 111011000112 |
| Base 3 | 21121203 | 21210013 |
| Base 4 | 1303234 | 1312034 |
| Base 5 | 244015 | 300315 |
| Base 6 | 123236 | 124316 |
| Base 7 | 52537 | 53417 |
| Base 8 | 34738 | 35438 |
| Base 9 | 24769 | 25319 |
| Base 10 | 185110 | 189110 |
| Base 11 | 143311 | 146a11 |
| Base 12 | 10a312 | 111712 |
| Base 13 | ac513 | b2613 |
| Base 14 | 96314 | 99114 |
| Base 15 | 83615 | 86115 |
| Base 16 | 73b16 | 76316 |