Compare 1520 vs 1531
| Property | 1520 | 1531 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 6 | 1 |
| Prime factorization | 24 × 51 × 191 | 15311 |
| Prime factorization | 2 × 2 × 2 × 2 × 5 × 19 | 1531 |
| Divisors count | 20 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520 | 1, 1531 |
| Number of properties | 0 | 5 |
| Centered decagonal primes | 13th | |
| Isolated primes | 143rd | |
| Long primes | 91st | |
| Primes | 242nd | |
| Ulam primes | 22nd | |
| Roman numberals | MDXX | MDXXXI |
| Base 2 | 101111100002 | 101111110112 |
| Base 3 | 20020223 | 20022013 |
| Base 4 | 1133004 | 1133234 |
| Base 5 | 220405 | 221115 |
| Base 6 | 110126 | 110316 |
| Base 7 | 43017 | 43157 |
| Base 8 | 27608 | 27738 |
| Base 9 | 20689 | 20819 |
| Base 10 | 152010 | 153110 |
| Base 11 | 116211 | 117211 |
| Base 12 | a6812 | a7712 |
| Base 13 | 8cc13 | 90a13 |
| Base 14 | 7a814 | 7b514 |
| Base 15 | 6b515 | 6c115 |
| Base 16 | 5f016 | 5fb16 |