Monday, January 12, 2009

519

519 = 3 x 173.

519 is the sum of three consecutive primes: 167 + 173 + 179 = 519.

519 is the number of trees on 15 vertices with diameter 5.

519 is a number that cannot be written as a sum of three squares.

Telephone area code 519 is in Ontario, Canada.

Source: What's Special About This Number?
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