5137 is a semiprime whose digit reversal is a pentagonal number (A115708).
5137 is 1010000010001 in base 2 (binary) and 1100101 in base 4. 5137 is 21001021 in base 3 and 12021 in base 8.
5137 is the number of 4-bead necklaces labeled with numbers -19 . . . 19 allowing reversal, with sum zero with no three beads in row equal (A209345).
5137 is the sum of four distinct powers of 4 (A038472).
Source: OEIS
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