13131 = 32 x 1459.
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.
