31013131232 has 48 divisors (see below), whose sum is σ = 64041606720. Its totient is φ = 14766432768.

The previous prime is 31013131231. The next prime is 31013131241. The reversal of 31013131232 is 23213131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223007 + ... + 334302.

It is an arithmetic number, because the mean of its divisors is an integer number (1334200140).

Almost surely, 2^31013131232 is an apocalyptic number.

31013131232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31013131232 is an abundant number, since it is smaller than the sum of its proper divisors (33028475488).

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

31013131232 is a wasteful number, since it uses less digits than its factorization.

31013131232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557403 (or 557395 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31013131232 its reverse (23213131013), we get a palindrome (54226262245).

The spelling of 31013131232 in words is "thirty-one billion, thirteen million, one hundred thirty-one thousand, two hundred thirty-two".