5510987654321

This number is a prime.

551 0987654321

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This prime can add: 55 is the sum of 10, 9, 8, 7, 6, 5, 4, 3, 2, 1. [Silva]

Submitted: 2013-10-12 11:08:02; Last Modified: 2013-10-12 13:01:11.