56517320 has 16 divisors (see below), whose sum is σ = 127164060. Its totient is φ = 22606912.

The previous prime is 56517319. The next prime is 56517323. The reversal of 56517320 is 2371565.

56517320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53963716 + 2553604 = 7346^2 + 1598^2 .

It is not an unprimeable number, because it can be changed into a prime (56517323) 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 3 ways as a sum of consecutive naturals, for example, 706427 + ... + 706506.

Almost surely, 2^56517320 is an apocalyptic number.

It is an amenable number.

56517320 is an abundant number, since it is smaller than the sum of its proper divisors (70646740).

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

56517320 is a wasteful number, since it uses less digits than its factorization.

56517320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412944 (or 1412940 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 56517320 is about 7517.8002101679. The cubic root of 56517320 is about 383.7607197082.

Adding to 56517320 its reverse (2371565), we get a palindrome (58888885).

The spelling of 56517320 in words is "fifty-six million, five hundred seventeen thousand, three hundred twenty".