Compare 1531 vs 1583
| Property | 1531 | 1583 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 15311 | 15831 |
| Prime factorization | 1531 | 1583 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1531 | 1, 1583 |
| Number of properties | 5 | 9 |
| Additive primes | 135th | |
| Centered decagonal primes | 13th | |
| Chen primes | 159th | |
| Cousin primes (2nd member) | 56th | |
| Emirps | 76th | |
| Harmonic primes | 84th | |
| Isolated primes | 143rd | 151st |
| Long primes | 91st | 98th |
| Primes | 242nd | 250th |
| Sophie germain primes | 53rd | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXXI | MDLXXXIII |
| Base 2 | 101111110112 | 110001011112 |
| Base 3 | 20022013 | 20111223 |
| Base 4 | 1133234 | 1202334 |
| Base 5 | 221115 | 223135 |
| Base 6 | 110316 | 111556 |
| Base 7 | 43157 | 44217 |
| Base 8 | 27738 | 30578 |
| Base 9 | 20819 | 21489 |
| Base 10 | 153110 | 158310 |
| Base 11 | 117211 | 120a11 |
| Base 12 | a7712 | abb12 |
| Base 13 | 90a13 | 94a13 |
| Base 14 | 7b514 | 81114 |
| Base 15 | 6c115 | 70815 |
| Base 16 | 5fb16 | 62f16 |