The folowing table expresses '221' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
Base | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
---|---|---|---|---|---|---|---|---|
2 | 11011101 | 110 | 10 | 1 | ||||
3 | 22012 | 21,10 | 1 | |||||
4 | 3131 | 20 | 2 | |||||
5 | 1341 | 14,10 | 1 | |||||
6 | 1005 | 10 | 1 | |||||
7 | 434 | 14 | 5 | |||||
8 | 335 | 13 | 4 | |||||
9 | 265 | 14 | 5 | |||||
10 | 221 | 5 | ||||||
11 | 191 | 10 | 1 | |||||
12 | 165 | 10 | 1 | |||||
13 | 140 | 5 | ||||||
14 | 11B | D | ||||||
15 | EB,1A | B | ||||||
16 | DD,1A | B |
Factors: 13 * 17
221 is in the Pythagorean Triples: (21, 220, 221), (60, 221, 229), (140, 171, 221).