Compare 1381 vs 1531
| Property | 1381 | 1531 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 13811 | 15311 |
| Prime factorization | 1381 | 1531 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1381 | 1, 1531 |
| Number of properties | 7 | 5 |
| Additive primes | 122nd | |
| Centered decagonal primes | 13th | |
| Chen primes | 144th | |
| Emirps | 64th | |
| Isolated primes | 130th | 143rd |
| Long primes | 86th | 91st |
| Primes | 221st | 242nd |
| Pythagorean primes | 109th | |
| Ulam primes | 22nd | |
| Roman numberals | MCCCLXXXI | MDXXXI |
| Base 2 | 101011001012 | 101111110112 |
| Base 3 | 12200113 | 20022013 |
| Base 4 | 1112114 | 1133234 |
| Base 5 | 210115 | 221115 |
| Base 6 | 102216 | 110316 |
| Base 7 | 40127 | 43157 |
| Base 8 | 25458 | 27738 |
| Base 9 | 18049 | 20819 |
| Base 10 | 138110 | 153110 |
| Base 11 | 104611 | 117211 |
| Base 12 | 97112 | a7712 |
| Base 13 | 82313 | 90a13 |
| Base 14 | 70914 | 7b514 |
| Base 15 | 62115 | 6c115 |
| Base 16 | 56516 | 5fb16 |