Compare 990215 vs 990221
| Property | 990215 | 990221 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 1980431 | 2571 × 38531 |
| Prime factorization | 5 × 198043 | 257 × 3853 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 198043, 990215 | 1, 257, 3853, 990221 |
| Number of properties | 1 | 1 |
| Semiprimes | 208079th | 208082nd |
| Roman numberals | ||
| Base 2 | 111100011100000001112 | 111100011100000011012 |
| Base 3 | 12120220221223 | 12120220222123 |
| Base 4 | 33013000134 | 33013000314 |
| Base 5 | 2231413305 | 2231413415 |
| Base 6 | 331201556 | 331202056 |
| Base 7 | 112626327 | 112626417 |
| Base 8 | 36160078 | 36160158 |
| Base 9 | 17682789 | 17682859 |
| Base 10 | 99021510 | 99022110 |
| Base 11 | 616a6611 | 616a7111 |
| Base 12 | 3b905b12 | 3b906512 |
| Base 13 | 28893513 | 28893b13 |
| Base 14 | 1bac1914 | 1bac2114 |
| Base 15 | 1485e515 | 1485eb15 |
| Base 16 | f1c0716 | f1c0d16 |