31231031132 has 96 divisors (see below), whose sum is σ = 65802240000. Its totient is φ = 12687816960.

The previous prime is 31231031123. The next prime is 31231031179. The reversal of 31231031132 is 23113013213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12250994 + ... + 12253542.

It is an arithmetic number, because the mean of its divisors is an integer number (685440000).

Almost surely, 2^31231031132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31231031132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32901120000).

31231031132 is an abundant number, since it is smaller than the sum of its proper divisors (34571208868).

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

31231031132 is a wasteful number, since it uses less digits than its factorization.

31231031132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2857 counting only the distinct ones).

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

Adding to 31231031132 its reverse (23113013213), we get a palindrome (54344044345).

The spelling of 31231031132 in words is "thirty-one billion, two hundred thirty-one million, thirty-one thousand, one hundred thirty-two".