56501520 has 80 divisors (see below), whose sum is σ = 178917120. Its totient is φ = 14743552.

The previous prime is 56501509. The next prime is 56501537. The reversal of 56501520 is 2510565.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8776 + ... + 13784.

It is an arithmetic number, because the mean of its divisors is an integer number (2236464).

Almost surely, 2^56501520 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 56501520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89458560).

56501520 is an abundant number, since it is smaller than the sum of its proper divisors (122415600).

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

56501520 is a wasteful number, since it uses less digits than its factorization.

56501520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072 (or 5066 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 56501520 is about 7516.7492974024. The cubic root of 56501520 is about 383.7249549521.

The spelling of 56501520 in words is "fifty-six million, five hundred one thousand, five hundred twenty".