The folowing table expresses '521' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1000001001 | 11,10 | 1 | |||||||
| 3 | 201022 | 21,10 | 1 | |||||||
| 4 | 20021 | 11 | 2 | |||||||
| 5 | 4041 | 14,10 | 1 | |||||||
| 6 | 2225 | 15,10 | 1 | |||||||
| 7 | 1343 | 14 | 5 | |||||||
| 8 | 1011 | 3 | ||||||||
| 9 | 638 | 18,10 | 1 | |||||||
| 10 | 521 | 8 | ||||||||
| 11 | 434 | 10 | 1 | |||||||
| 12 | 375 | 13 | 4 | |||||||
| 13 | 311 | 5 | ||||||||
| 14 | 293 | 10 | 1 | |||||||
| 15 | 24B | 12 | 3 | |||||||
| 16 | 209 | B |
Factors: Prime
521 is in the Pythagorean Triple: (279, 440, 521).