Compare 221 vs 229
| Property | 221 | 229 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 131 × 171 | 2291 |
| Prime factorization | 13 × 17 | 229 |
| Divisors count | 4 | 2 |
| Divisors | 1, 13, 17, 221 | 1, 229 |
| Number of properties | 1 | 9 |
| Additive primes | 30th | |
| Cousin primes (1st member) | 16th | |
| Long primes | 19th | |
| Primes | 50th | |
| Prime triplets (2nd member) | 16th | |
| Prime triplets (3rd member) | 15th | |
| Pythagorean primes | 22nd | |
| Semiprimes | 75th | |
| Sexy primes (2nd member) | 27th | |
| Twin primes (2nd member) | 16th | |
| Roman numberals | CCXXI | CCXXIX |
| Base 2 | 110111012 | 111001012 |
| Base 3 | 220123 | 221113 |
| Base 4 | 31314 | 32114 |
| Base 5 | 13415 | 14045 |
| Base 6 | 10056 | 10216 |
| Base 7 | 4347 | 4457 |
| Base 8 | 3358 | 3458 |
| Base 9 | 2659 | 2749 |
| Base 10 | 22110 | 22910 |
| Base 11 | 19111 | 19911 |
| Base 12 | 16512 | 17112 |
| Base 13 | 14013 | 14813 |
| Base 14 | 11b14 | 12514 |
| Base 15 | eb15 | 10415 |
| Base 16 | dd16 | e516 |