65

This number is a composite.

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

Submitted: 2001-08-20 15:06:02;   Last Modified: 2023-02-18 00:38:10.
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