56533520 has 20 divisors (see below), whose sum is σ = 131440620. Its totient is φ = 22613376.

The previous prime is 56533513. The next prime is 56533523. The reversal of 56533520 is 2533565.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21864976 + 34668544 = 4676^2 + 5888^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56533523) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 353255 + ... + 353414.

It is an arithmetic number, because the mean of its divisors is an integer number (6572031).

Almost surely, 2^56533520 is an apocalyptic number.

It is an amenable number.

56533520 is an abundant number, since it is smaller than the sum of its proper divisors (74907100).

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

56533520 is a wasteful number, since it uses less digits than its factorization.

56533520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706682 (or 706676 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 29.

The square root of 56533520 is about 7518.8775758088. The cubic root of 56533520 is about 383.7973829809.

The spelling of 56533520 in words is "fifty-six million, five hundred thirty-three thousand, five hundred twenty".