56131240 has 128 divisors (see below), whose sum is σ = 146966400. Its totient is φ = 19102720.

The previous prime is 56131219. The next prime is 56131241. The reversal of 56131240 is 4213165.

It is a super-2 number, since 2×56131240² = 6301432207875200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (56131241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676239 + ... + 676321.

It is an arithmetic number, because the mean of its divisors is an integer number (1148175).

Almost surely, 2^56131240 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 56131240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73483200).

56131240 is an abundant number, since it is smaller than the sum of its proper divisors (90835160).

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

56131240 is a wasteful number, since it uses less digits than its factorization.

56131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 56131240 is about 7492.0784833049. The cubic root of 56131240 is about 382.8848761058.

The spelling of 56131240 in words is "fifty-six million, one hundred thirty-one thousand, two hundred forty".