13131

13131 = 3² x 1459.

13131 is an octahedral number.

13131 is palindromic in base 10 and in base 8 (31513).

13131 is a palindrome n such that 6n + 1 is also a palindrome: 78787.

13131 is the ninth-largest palindrome whose digit sum is 9.

13131 is a nonprime such that the sum of its digits equals the product of its digits: 1 + 3 + 1 + 3 + 1 = 9 = 1 x 3 x 1 x 3 x 1.

13131 is the zip code for Parish, N.Y.

Source: On-Line Encyclopedia of Integer Sequences