31172404 has 12 divisors (see below), whose sum is σ = 54982144. Its totient is φ = 15463224.

The previous prime is 31172381. The next prime is 31172411. The reversal of 31172404 is 40427113.

It is a super-2 number, since 2×31172404² = 1943437542278432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30174 + ... + 31189.

Almost surely, 2^31172404 is an apocalyptic number.

It is an amenable number.

31172404 is a deficient number, since it is larger than the sum of its proper divisors (23809740).

31172404 is a wasteful number, since it uses less digits than its factorization.

31172404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61494 (or 61492 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 31172404 is about 5583.2252327844. The cubic root of 31172404 is about 314.7193401680.

Adding to 31172404 its reverse (40427113), we get a palindrome (71599517).

The spelling of 31172404 in words is "thirty-one million, one hundred seventy-two thousand, four hundred four".