31087056 has 160 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 7441920.

The previous prime is 31087051. The next prime is 31087057. The reversal of 31087056 is 65078013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31087051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47725 + ... + 48371.

Almost surely, 2^31087056 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 31087056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53996544).

31087056 is an abundant number, since it is smaller than the sum of its proper divisors (76906032).

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

31087056 is a wasteful number, since it uses less digits than its factorization.

31087056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 31087056 is about 5575.5767414681. The cubic root of 31087056 is about 314.4318506538.

The spelling of 31087056 in words is "thirty-one million, eighty-seven thousand, fifty-six".