Compare 145 vs 151
| Property | 145 | 151 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 291 | 1511 |
| Prime factorization | 5 × 29 | 151 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 29, 145 | 1, 151 |
| Number of properties | 1 | 9 |
| Additive primes | 20th | |
| Centered decagonal primes | 5th | |
| Lucky primes | 11th | |
| Multiplicative primes | 11th | |
| Palindromic primes | 8th | |
| Primes | 36th | |
| Semiprimes | 49th | |
| Sexy primes (1st member) | 21st | |
| Sexy prime triplets (1st member) | 12th | |
| Twin primes (2nd member) | 12th | |
| Roman numberals | CXLV | CLI |
| Base 2 | 100100012 | 100101112 |
| Base 3 | 121013 | 121213 |
| Base 4 | 21014 | 21134 |
| Base 5 | 10405 | 11015 |
| Base 6 | 4016 | 4116 |
| Base 7 | 2657 | 3047 |
| Base 8 | 2218 | 2278 |
| Base 9 | 1719 | 1779 |
| Base 10 | 14510 | 15110 |
| Base 11 | 12211 | 12811 |
| Base 12 | 10112 | 10712 |
| Base 13 | b213 | b813 |
| Base 14 | a514 | ab14 |
| Base 15 | 9a15 | a115 |
| Base 16 | 9116 | 9716 |