13131232 has 24 divisors (see below), whose sum is σ = 25995816. Its totient is φ = 6529152.

The previous prime is 13131203. The next prime is 13131233. The reversal of 13131232 is 23213131.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5263 + ... + 7345.

It is an arithmetic number, because the mean of its divisors is an integer number (1083159).

Almost surely, 2^13131232 is an apocalyptic number.

It is an amenable number.

13131232 is a deficient number, since it is larger than the sum of its proper divisors (12864584).

13131232 is a wasteful number, since it uses less digits than its factorization.

13131232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2282 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 13131232 is about 3623.7041821871. The cubic root of 13131232 is about 235.9220272911.

Adding to 13131232 its reverse (23213131), we get a palindrome (36344363).

The spelling of 13131232 in words is "thirteen million, one hundred thirty-one thousand, two hundred thirty-two".