Numeric Value: 210

The folowing table expresses '210' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.

BaseDR8DR7DR6DR5DR4DR3DR2DR1
211010010    100 1
3   21210  202
4    3102 123
5    1320 112
6     550145
7     420 6
8     322 7
9     253112
10     210 3
11     181 A
12     156101
13     132 6
14     110 2
15      E0E
16      D2F

Math World

Factors: 2 * 3 * 5 * 7

210 is the sum of the counting numbers from 1 to 20 (See 'The Sum/Product of the First N Counting Numbers').