Friday, October 22, 2010

217

217 = 7 x 31.


47 and 89 are primes, as is their concatenation: 4789. Inserting 0 between them transforms the prime into a power: 47089 = 2172.

217 is 1001 in base 6 and 161 in base 12.


217 is the telephone area code covering much of central Illinois.

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