56533521 has 16 divisors (see below), whose sum is σ = 84454848. Its totient is φ = 33336000.

The previous prime is 56533513. The next prime is 56533523. The reversal of 56533521 is 12533565.

It is not a de Polignac number, because 56533521 - 2³ = 56533513 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21930 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (5278428).

Almost surely, 2^56533521 is an apocalyptic number.

It is an amenable number.

56533521 is a deficient number, since it is larger than the sum of its proper divisors (27921327).

56533521 is a wasteful number, since it uses less digits than its factorization.

56533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46352.

The product of its digits is 13500, while the sum is 30.

The square root of 56533521 is about 7518.8776423081. The cubic root of 56533521 is about 383.7973852439.

The spelling of 56533521 in words is "fifty-six million, five hundred thirty-three thousand, five hundred twenty-one".