Compare 221621 vs 221891
| Property | 221621 | 221891 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2216211 | 2218911 |
| Prime factorization | 221621 | 221891 |
| Divisors count | 2 | 2 |
| Divisors | 1, 221621 | 1, 221891 |
| Number of properties | 7 | 5 |
| Additive primes | 8002nd | |
| Chen primes | 8229th | 8237th |
| Harmonic primes | 7412th | |
| Isolated primes | 15079th | |
| Long primes | 7390th | 7395th |
| Primes | 19745th | 19768th |
| Pythagorean primes | 9852nd | |
| Sophie germain primes | 2239th | |
| Twin primes (1st member) | 2343rd | |
| Roman numberals | ||
| Base 2 | 1101100001101101012 | 1101100010110000112 |
| Base 3 | 1020210000123 | 1020211010123 |
| Base 4 | 3120123114 | 3120230034 |
| Base 5 | 240424415 | 241000315 |
| Base 6 | 44300056 | 44311356 |
| Base 7 | 16120617 | 16126257 |
| Base 8 | 6606658 | 6613038 |
| Base 9 | 3670059 | 3673359 |
| Base 10 | 22162110 | 22189110 |
| Base 11 | 14156411 | 14178a11 |
| Base 12 | a830512 | a84ab12 |
| Base 13 | 79b4a13 | 79cc713 |
| Base 14 | 5aaa114 | 5ac1514 |
| Base 15 | 459eb15 | 45b2b15 |
| Base 16 | 361b516 | 362c316 |