56165617 has 4 divisors (see below), whose sum is σ = 56326900. Its totient is φ = 56004336.

The previous prime is 56165587. The next prime is 56165621. The reversal of 56165617 is 71656165.

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 33593616 + 22572001 = 5796^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 56165617 - 2¹⁵ = 56132849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56165647) 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, 80118 + ... + 80815.

It is an arithmetic number, because the mean of its divisors is an integer number (14081725).

Almost surely, 2^56165617 is an apocalyptic number.

It is an amenable number.

56165617 is a deficient number, since it is larger than the sum of its proper divisors (161283).

56165617 is a wasteful number, since it uses less digits than its factorization.

56165617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161282.

The product of its digits is 37800, while the sum is 37.

The square root of 56165617 is about 7494.3723553077. The cubic root of 56165617 is about 382.9630247875.

The spelling of 56165617 in words is "fifty-six million, one hundred sixty-five thousand, six hundred seventeen".