31252431972 has 48 divisors (see below), whose sum is σ = 75569961600. Its totient is φ = 10040513280.

The previous prime is 31252431971. The next prime is 31252432031. The reversal of 31252431972 is 27913425213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31252431972.

It is not an unprimeable number, because it can be changed into a prime (31252431971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119097 + ... + 276927.

It is an arithmetic number, because the mean of its divisors is an integer number (1574374200).

Almost surely, 2^31252431972 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 31252431972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37784980800).

31252431972 is an abundant number, since it is smaller than the sum of its proper divisors (44317529628).

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

31252431972 is a wasteful number, since it uses less digits than its factorization.

31252431972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158436 (or 158434 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 31252431972 in words is "thirty-one billion, two hundred fifty-two million, four hundred thirty-one thousand, nine hundred seventy-two".