56521017 has 16 divisors (see below), whose sum is σ = 95697280. Its totient is φ = 32297616.

The previous prime is 56521013. The next prime is 56521033. The reversal of 56521017 is 71012565.

56521017 is a `hidden beast` number, since 5 + 652 + 1 + 0 + 1 + 7 = 666.

It is not a de Polignac number, because 56521017 - 2² = 56521013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (56521013) 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, 149338 + ... + 149715.

It is an arithmetic number, because the mean of its divisors is an integer number (5981080).

Almost surely, 2^56521017 is an apocalyptic number.

It is an amenable number.

56521017 is a deficient number, since it is larger than the sum of its proper divisors (39176263).

56521017 is a wasteful number, since it uses less digits than its factorization.

56521017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299069 (or 299063 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 56521017 is about 7518.0460892442. The cubic root of 56521017 is about 383.7690872461.

The spelling of 56521017 in words is "fifty-six million, five hundred twenty-one thousand, seventeen".