Compare 1881 vs 1891
| Property | 1881 | 1891 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 32 × 111 × 191 | 311 × 611 |
| Prime factorization | 3 × 3 × 11 × 19 | 31 × 61 |
| Divisors count | 12 | 4 |
| Divisors | 1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 627, 1881 | 1, 31, 61, 1891 |
| Number of properties | 0 | 1 |
| Semiprimes | 542nd | |
| Roman numberals | MDCCCLXXXI | MDCCCXCI |
| Base 2 | 111010110012 | 111011000112 |
| Base 3 | 21202003 | 21210013 |
| Base 4 | 1311214 | 1312034 |
| Base 5 | 300115 | 300315 |
| Base 6 | 124136 | 124316 |
| Base 7 | 53257 | 53417 |
| Base 8 | 35318 | 35438 |
| Base 9 | 25209 | 25319 |
| Base 10 | 188110 | 189110 |
| Base 11 | 146011 | 146a11 |
| Base 12 | 110912 | 111712 |
| Base 13 | b1913 | b2613 |
| Base 14 | 98514 | 99114 |
| Base 15 | 85615 | 86115 |
| Base 16 | 75916 | 76316 |