Compare 45 vs 53
| Property | 45 | 53 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 32 × 51 | 531 |
| Prime factorization | 3 × 3 × 5 | 53 |
| Divisors count | 6 | 2 |
| Divisors | 1, 3, 5, 9, 15, 45 | 1, 53 |
| Number of properties | 0 | 18 |
| Chen primes | 15th | |
| Class 1+ primes | 10th | |
| Good primes | 7th | |
| Isolated primes | 5th | |
| Left-truncatable primes | 11th | |
| Pierpont primes of the 2nd kind | 10th | |
| Primes | 16th | |
| Pythagorean primes | 7th | |
| Restricted right-truncatable primes | 1st | |
| Right-truncatable primes | 9th | |
| Sexy primes (1st member) | 11th | |
| Sexy primes (2nd member) | 10th | |
| Sexy prime quadrupletss (3rd member) | 3rd | |
| Sexy prime triplets (2nd member) | 7th | |
| Sexy prime triplets (3rd member) | 6th | |
| Sophie germain primes | 8th | |
| Two-sided primes | 7th | |
| Ulam primes | 6th | |
| Roman numberals | XLV | LIII |
| Base 2 | 1011012 | 1101012 |
| Base 3 | 12003 | 12223 |
| Base 4 | 2314 | 3114 |
| Base 5 | 1405 | 2035 |
| Base 6 | 1136 | 1256 |
| Base 7 | 637 | 1047 |
| Base 8 | 558 | 658 |
| Base 9 | 509 | 589 |
| Base 10 | 4510 | 5310 |
| Base 11 | 4111 | 4911 |
| Base 12 | 3912 | 4512 |
| Base 13 | 3613 | 4113 |
| Base 14 | 3314 | 3b14 |
| Base 15 | 3015 | 3815 |
| Base 16 | 2d16 | 3516 |