13231131 has 12 divisors (see below), whose sum is σ = 17846376. Its totient is φ = 8719360.

The previous prime is 13231123. The next prime is 13231147. The reversal of 13231131 is 13113231.

13231131 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13231131 - 2³ = 13231123 is a prime.

It is a super-2 number, since 2×13231131² = 350125655078322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13231131.

It is not an unprimeable number, because it can be changed into a prime (13231171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51355 + ... + 51611.

It is an arithmetic number, because the mean of its divisors is an integer number (1487198).

Almost surely, 2^13231131 is an apocalyptic number.

13231131 is a deficient number, since it is larger than the sum of its proper divisors (4615245).

13231131 is an equidigital number, since it uses as much as digits as its factorization.

13231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 391 counting only the distinct ones).

The product of its digits is 54, while the sum is 15.

The square root of 13231131 is about 3637.4621647517. The cubic root of 13231131 is about 236.5187943114.

Adding to 13231131 its reverse (13113231), we get a palindrome (26344362).

The spelling of 13231131 in words is "thirteen million, two hundred thirty-one thousand, one hundred thirty-one".