65

This number is a composite.

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65 is the ONLY number which gives a prime square, on adding as well as subtracting its reverse from it (65 + 56 = 112, 65 - 56 = 32). [Gupta]

Submitted: 2001-08-20 10:06:02;   Last Modified: 2008-01-30 11:28:00.
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