56131590 has 64 divisors (see below), whose sum is σ = 140794560. Its totient is φ = 14307840.

The previous prime is 56131571. The next prime is 56131609. The reversal of 56131590 is 9513165.

It is an interprime number because it is at equal distance from previous prime (56131571) and next prime (56131609).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67296 + ... + 68124.

It is an arithmetic number, because the mean of its divisors is an integer number (2199915).

Almost surely, 2^56131590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56131590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70397280).

56131590 is an abundant number, since it is smaller than the sum of its proper divisors (84662970).

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

56131590 is a wasteful number, since it uses less digits than its factorization.

56131590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 56131590 is about 7492.1018412726. The cubic root of 56131590 is about 382.8856719159.

The spelling of 56131590 in words is "fifty-six million, one hundred thirty-one thousand, five hundred ninety".