Compare 30 vs 61
| Property | 30 | 61 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 31 × 51 | 611 |
| Prime factorization | 2 × 3 × 5 | 61 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 3, 5, 6, 10, 15, 30 | 1, 61 |
| Number of properties | 0 | 12 |
| Additive primes | 11th | |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Cuban primes 1 | 4th | |
| Long primes | 8th | |
| Primes | 18th | |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Twin primes (2nd member) | 7th | |
| Roman numberals | XXX | LXI |
| Base 2 | 111102 | 1111012 |
| Base 3 | 10103 | 20213 |
| Base 4 | 1324 | 3314 |
| Base 5 | 1105 | 2215 |
| Base 6 | 506 | 1416 |
| Base 7 | 427 | 1157 |
| Base 8 | 368 | 758 |
| Base 9 | 339 | 679 |
| Base 10 | 3010 | 6110 |
| Base 11 | 2811 | 5611 |
| Base 12 | 2612 | 5112 |
| Base 13 | 2413 | 4913 |
| Base 14 | 2214 | 4514 |
| Base 15 | 2015 | 4115 |
| Base 16 | 1e16 | 3d16 |