31000472 has 32 divisors (see below), whose sum is σ = 59584800. Its totient is φ = 15116544.

The previous prime is 31000471. The next prime is 31000477. The reversal of 31000472 is 27400013.

It is a happy number.

It is a super-2 number, since 2×31000472² = 1922058528445568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31000472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000471) 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, 63413 + ... + 63899.

It is an arithmetic number, because the mean of its divisors is an integer number (1862025).

Almost surely, 2^31000472 is an apocalyptic number.

It is an amenable number.

31000472 is a deficient number, since it is larger than the sum of its proper divisors (28584328).

31000472 is a wasteful number, since it uses less digits than its factorization.

31000472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 31000472 is about 5567.8067495200. The cubic root of 31000472 is about 314.1396595662.

Adding to 31000472 its reverse (27400013), we get a palindrome (58400485).

The spelling of 31000472 in words is "thirty-one million, four hundred seventy-two", and thus it is an aban number.