56004533521 has 4 divisors (see below), whose sum is σ = 56018835252. Its totient is φ = 55990231792.

The previous prime is 56004533489. The next prime is 56004533549. The reversal of 56004533521 is 12533540065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40455690496 + 15548843025 = 201136^2 + 124695^2 .

It is a cyclic number.

It is not a de Polignac number, because 56004533521 - 2⁵ = 56004533489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56004533581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144990 + ... + 7152823.

It is an arithmetic number, because the mean of its divisors is an integer number (14004708813).

Almost surely, 2^56004533521 is an apocalyptic number.

It is an amenable number.

56004533521 is a deficient number, since it is larger than the sum of its proper divisors (14301731).

56004533521 is a wasteful number, since it uses less digits than its factorization.

56004533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301730.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 56004533521 in words is "fifty-six billion, four million, five hundred thirty-three thousand, five hundred twenty-one".