31213032 has 32 divisors (see below), whose sum is σ = 80551680. Its totient is φ = 10068480.

The previous prime is 31213027. The next prime is 31213043. The reversal of 31213032 is 23031213.

31213032 is nontrivially palindromic in base 14.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20233 + ... + 21720.

It is an arithmetic number, because the mean of its divisors is an integer number (2517240).

Almost surely, 2^31213032 is an apocalyptic number.

It is an amenable number.

31213032 is an abundant number, since it is smaller than the sum of its proper divisors (49338648).

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

31213032 is a wasteful number, since it uses less digits than its factorization.

31213032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41993 (or 41989 counting only the distinct ones).

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

The square root of 31213032 is about 5586.8624468480. The cubic root of 31213032 is about 314.8560087675.

Adding to 31213032 its reverse (23031213), we get a palindrome (54244245).

The spelling of 31213032 in words is "thirty-one million, two hundred thirteen thousand, thirty-two".