Compare 1530 vs 1531
| Property | 1530 | 1531 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 21 × 32 × 51 × 171 | 15311 |
| Prime factorization | 2 × 3 × 3 × 5 × 17 | 1531 |
| Divisors count | 24 | 2 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 51, 85, 90, 102, 153, 170, 255, 306, 510, 765, 1530 | 1, 1531 |
| Number of properties | 0 | 5 |
| Centered decagonal primes | 13th | |
| Isolated primes | 143rd | |
| Long primes | 91st | |
| Primes | 242nd | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXX | MDXXXI |
| Base 2 | 101111110102 | 101111110112 |
| Base 3 | 20022003 | 20022013 |
| Base 4 | 1133224 | 1133234 |
| Base 5 | 221105 | 221115 |
| Base 6 | 110306 | 110316 |
| Base 7 | 43147 | 43157 |
| Base 8 | 27728 | 27738 |
| Base 9 | 20809 | 20819 |
| Base 10 | 153010 | 153110 |
| Base 11 | 117111 | 117211 |
| Base 12 | a7612 | a7712 |
| Base 13 | 90913 | 90a13 |
| Base 14 | 7b414 | 7b514 |
| Base 15 | 6c015 | 6c115 |
| Base 16 | 5fa16 | 5fb16 |