Compare 43 vs 45
| Property | 43 | 45 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 3 |
| Prime factorization | 431 | 32 × 51 |
| Prime factorization | 43 | 3 × 3 × 5 |
| Divisors count | 2 | 6 |
| Divisors | 1, 43 | 1, 3, 5, 9, 15, 45 |
| Number of properties | 12 | 0 |
| Additive primes | 9th | |
| Centered heptagonal primes | 1st | |
| Cousin primes (1st member) | 6th | |
| Left-truncatable primes | 9th | |
| Lucky primes | 6th | |
| Primes | 14th | |
| Prime triplets (2nd member) | 7th | |
| Prime triplets (3rd member) | 6th | |
| Sexy primes (2nd member) | 8th | |
| Sexy prime triplets (3rd member) | 5th | |
| Twin primes (2nd member) | 6th | |
| Wagstaff primes | 3rd | |
| Roman numberals | XLIII | XLV |
| Base 2 | 1010112 | 1011012 |
| Base 3 | 11213 | 12003 |
| Base 4 | 2234 | 2314 |
| Base 5 | 1335 | 1405 |
| Base 6 | 1116 | 1136 |
| Base 7 | 617 | 637 |
| Base 8 | 538 | 558 |
| Base 9 | 479 | 509 |
| Base 10 | 4310 | 4510 |
| Base 11 | 3a11 | 4111 |
| Base 12 | 3712 | 3912 |
| Base 13 | 3413 | 3613 |
| Base 14 | 3114 | 3314 |
| Base 15 | 2d15 | 3015 |
| Base 16 | 2b16 | 2d16 |