Compare 399215 vs 399221
| Property | 399215 | 399221 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 798431 | 3992211 |
| Prime factorization | 5 × 79843 | 399221 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 79843, 399215 | 1, 399221 |
| Number of properties | 1 | 5 |
| Chen primes | 13642nd | |
| Isolated primes | 26207th | |
| Primes | 33798th | |
| Semiprimes | 87387th | |
| Sexy primes (1st member) | 7640th | |
| Sophie germain primes | 3586th | |
| Roman numberals | ||
| Base 2 | 11000010111011011112 | 11000010111011101012 |
| Base 3 | 2020211212023 | 2020211212223 |
| Base 4 | 12011312334 | 12011313114 |
| Base 5 | 1002333305 | 1002333415 |
| Base 6 | 123201156 | 123201256 |
| Base 7 | 32516157 | 32516247 |
| Base 8 | 14135578 | 14135658 |
| Base 9 | 6675529 | 6675589 |
| Base 10 | 39921510 | 39922110 |
| Base 11 | 252a3311 | 252a3911 |
| Base 12 | 17303b12 | 17304512 |
| Base 13 | 10c92b13 | 10c93413 |
| Base 14 | a56b514 | a56bb14 |
| Base 15 | 7d44515 | 7d44b15 |
| Base 16 | 6176f16 | 6177516 |