56321520 has 40 divisors (see below), whose sum is σ = 174597456. Its totient is φ = 15019008.

The previous prime is 56321519. The next prime is 56321537. The reversal of 56321520 is 2512365.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×56321520² = 6344227230220800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117097 + ... + 117576.

Almost surely, 2^56321520 is an apocalyptic number.

It is an amenable number.

56321520 is an abundant number, since it is smaller than the sum of its proper divisors (118275936).

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

56321520 is a wasteful number, since it uses less digits than its factorization.

56321520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234689 (or 234683 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 56321520 is about 7504.7664853745. The cubic root of 56321520 is about 383.3170369044.

Adding to 56321520 its reverse (2512365), we get a palindrome (58833885).

The spelling of 56321520 in words is "fifty-six million, three hundred twenty-one thousand, five hundred twenty".