13231972 has 12 divisors (see below), whose sum is σ = 24937276. Its totient is φ = 6107040.

The previous prime is 13231963. The next prime is 13231973. The reversal of 13231972 is 27913231.

It can be written as a sum of positive squares in 2 ways, for example, as 1218816 + 12013156 = 1104^2 + 3466^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13231972.

It is not an unprimeable number, because it can be changed into a prime (13231973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127179 + ... + 127282.

Almost surely, 2^13231972 is an apocalyptic number.

It is an amenable number.

13231972 is a deficient number, since it is larger than the sum of its proper divisors (11705304).

13231972 is a wasteful number, since it uses less digits than its factorization.

13231972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254478 (or 254476 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 13231972 is about 3637.5777654918. The cubic root of 13231972 is about 236.5238054248.

The spelling of 13231972 in words is "thirteen million, two hundred thirty-one thousand, nine hundred seventy-two".