31315056 has 40 divisors (see below), whose sum is σ = 81133200. Its totient is φ = 10407936.

The previous prime is 31315013. The next prime is 31315069. The reversal of 31315056 is 65051313.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 20826 + ... + 22278.

It is an arithmetic number, because the mean of its divisors is an integer number (2028330).

Almost surely, 2^31315056 is an apocalyptic number.

It is an amenable number.

31315056 is an abundant number, since it is smaller than the sum of its proper divisors (49818144).

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

31315056 is a wasteful number, since it uses less digits than its factorization.

31315056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 31315056 is about 5595.9857040561. The cubic root of 31315056 is about 315.1986854369.

Adding to 31315056 its reverse (65051313), we get a palindrome (96366369).

The spelling of 31315056 in words is "thirty-one million, three hundred fifteen thousand, fifty-six".