31120472 has 32 divisors (see below), whose sum is σ = 64476000. Its totient is φ = 14006784.

The previous prime is 31120457. The next prime is 31120483. The reversal of 31120472 is 27402113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847 + ... + 8102.

It is an arithmetic number, because the mean of its divisors is an integer number (2014875).

Almost surely, 2^31120472 is an apocalyptic number.

It is an amenable number.

31120472 is an abundant number, since it is smaller than the sum of its proper divisors (33355528).

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

31120472 is a wasteful number, since it uses less digits than its factorization.

31120472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9995 (or 9991 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 31120472 is about 5578.5725772818. The cubic root of 31120472 is about 314.5444730073.

Adding to 31120472 its reverse (27402113), we get a palindrome (58522585).

The spelling of 31120472 in words is "thirty-one million, one hundred twenty thousand, four hundred seventy-two".