31119972 has 24 divisors (see below), whose sum is σ = 78199296. Its totient is φ = 9575328.

The previous prime is 31119971. The next prime is 31119983. The reversal of 31119972 is 27991113.

It is not an unprimeable number, because it can be changed into a prime (31119971) 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, 99588 + ... + 99899.

It is an arithmetic number, because the mean of its divisors is an integer number (3258304).

Almost surely, 2^31119972 is an apocalyptic number.

It is an amenable number.

31119972 is an abundant number, since it is smaller than the sum of its proper divisors (47079324).

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

31119972 is a wasteful number, since it uses less digits than its factorization.

31119972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199507 (or 199505 counting only the distinct ones).

The product of its digits is 3402, while the sum is 33.

The square root of 31119972 is about 5578.5277627704. The cubic root of 31119972 is about 314.5427884455.

The spelling of 31119972 in words is "thirty-one million, one hundred nineteen thousand, nine hundred seventy-two".