Compare 1531 vs 1597
| Property | 1531 | 1597 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 15311 | 15971 |
| Prime factorization | 1531 | 1597 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1531 | 1, 1597 |
| Number of properties | 5 | 9 |
| Centered decagonal primes | 13th | |
| Cousin primes (1st member) | 57th | |
| Emirps | 77th | |
| Fibonacci primes | 7th | |
| Good primes | 56th | |
| Isolated primes | 143rd | 152nd |
| Long primes | 91st | |
| Lucky primes | 61st | |
| Primes | 242nd | 251st |
| Pythagorean primes | 119th | |
| Super primes | 54th | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXXI | MDXCVII |
| Base 2 | 101111110112 | 110001111012 |
| Base 3 | 20022013 | 20120113 |
| Base 4 | 1133234 | 1203314 |
| Base 5 | 221115 | 223425 |
| Base 6 | 110316 | 112216 |
| Base 7 | 43157 | 44417 |
| Base 8 | 27738 | 30758 |
| Base 9 | 20819 | 21649 |
| Base 10 | 153110 | 159710 |
| Base 11 | 117211 | 122211 |
| Base 12 | a7712 | b1112 |
| Base 13 | 90a13 | 95b13 |
| Base 14 | 7b514 | 82114 |
| Base 15 | 6c115 | 71715 |
| Base 16 | 5fb16 | 63d16 |