Compare 181205 vs 181213
| Property | 181205 | 181213 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 362411 | 1812131 |
| Prime factorization | 5 × 36241 | 181213 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 36241, 181205 | 1, 181213 |
| Number of properties | 1 | 6 |
| Harmonic primes | 6156th | |
| Lucky primes | 2125th | |
| Primes | 16431st | |
| Pythagorean primes | 8202nd | |
| Semiprimes | 41198th | |
| Sexy primes (1st member) | 3948th | |
| Twin primes (2nd member) | 1988th | |
| Roman numberals | ||
| Base 2 | 1011000011110101012 | 1011000011110111012 |
| Base 3 | 1000121200223 | 1000121201213 |
| Base 4 | 2300331114 | 2300331314 |
| Base 5 | 212443105 | 212443235 |
| Base 6 | 35145256 | 35145416 |
| Base 7 | 13532037 | 13532147 |
| Base 8 | 5417258 | 5417358 |
| Base 9 | 3055089 | 3055179 |
| Base 10 | 18120510 | 18121310 |
| Base 11 | 11416211 | 11416a11 |
| Base 12 | 88a4512 | 88a5112 |
| Base 13 | 6462b13 | 6463613 |
| Base 14 | 4a07314 | 4a07b14 |
| Base 15 | 38a5515 | 38a5d15 |
| Base 16 | 2c3d516 | 2c3dd16 |