56501540 has 48 divisors (see below), whose sum is σ = 126654192. Its totient is φ = 21098496.

The previous prime is 56501537. The next prime is 56501581. The reversal of 56501540 is 4510565.

It can be written as a sum of positive squares in 8 ways, for example, as 1623076 + 54878464 = 1274^2 + 7408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45974 + ... + 47186.

It is an arithmetic number, because the mean of its divisors is an integer number (2638629).

Almost surely, 2^56501540 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 56501540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63327096).

56501540 is an abundant number, since it is smaller than the sum of its proper divisors (70152652).

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

56501540 is a wasteful number, since it uses less digits than its factorization.

56501540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 56501540 is about 7516.7506277646. The cubic root of 56501540 is about 383.7250002282.

The spelling of 56501540 in words is "fifty-six million, five hundred one thousand, five hundred forty".