Friday, January 21, 2011

553

553 = 7 x 79.


553 is the sum of nine consecutive primes: 553 = 43 + 47 + 53 + 59 + 61 + 67 + 71 + 73 + 79.

Inserting a zero between adjacent digits of 553 produces a prime: 50503.

The CN Tower in Toronto is about 553 meters tall.

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