31130232 has 32 divisors (see below), whose sum is σ = 88944000. Its totient is φ = 8894304.

The previous prime is 31130221. The next prime is 31130233. The reversal of 31130232 is 23203113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92482 + ... + 92817.

It is an arithmetic number, because the mean of its divisors is an integer number (2779500).

Almost surely, 2^31130232 is an apocalyptic number.

It is an amenable number.

31130232 is an abundant number, since it is smaller than the sum of its proper divisors (57813768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31130232 is a wasteful number, since it uses less digits than its factorization.

31130232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185315 (or 185311 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31130232 is about 5579.4472844539. The cubic root of 31130232 is about 314.5773520414.

Adding to 31130232 its reverse (23203113), we get a palindrome (54333345).

The spelling of 31130232 in words is "thirty-one million, one hundred thirty thousand, two hundred thirty-two".