Compare 221621 vs 221999
| Property | 221621 | 221999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2216211 | 2219991 |
| Prime factorization | 221621 | 221999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 221621 | 1, 221999 |
| Number of properties | 7 | 4 |
| Chen primes | 8229th | 8241st |
| Harmonic primes | 7412th | |
| Isolated primes | 15083rd | |
| Long primes | 7390th | |
| Primes | 19745th | 19776th |
| Pythagorean primes | 9852nd | |
| Sophie germain primes | 2239th | 2240th |
| Twin primes (1st member) | 2343rd | |
| Roman numberals | ||
| Base 2 | 1101100001101101012 | 1101100011001011112 |
| Base 3 | 1020210000123 | 1020211120123 |
| Base 4 | 3120123114 | 3120302334 |
| Base 5 | 240424415 | 241004445 |
| Base 6 | 44300056 | 44314356 |
| Base 7 | 16120617 | 16131417 |
| Base 8 | 6606658 | 6614578 |
| Base 9 | 3670059 | 3674659 |
| Base 10 | 22162110 | 22199910 |
| Base 11 | 14156411 | 14187811 |
| Base 12 | a830512 | a857b12 |
| Base 13 | 79b4a13 | 7a07b13 |
| Base 14 | 5aaa114 | 5ac9114 |
| Base 15 | 459eb15 | 45b9e15 |
| Base 16 | 361b516 | 3632f16 |