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818 is the smallest palindrome that may be expressed as the sum of the squares of two primes (23^{2} + 17^{2}). [King] 818 is the only 3digit tetradic integer such that the sum of the differences of the number and each digit raised to the digit is prime. I.e., (8188)^8+(8181)^1+(8188)^8 is prime. [Opao]
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