56523865 has 4 divisors (see below), whose sum is σ = 67828644. Its totient is φ = 45219088.

The previous prime is 56523847. The next prime is 56523869. The reversal of 56523865 is 56832565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56832565 = 5 ⋅11366513.

It can be written as a sum of positive squares in 2 ways, for example, as 11042329 + 45481536 = 3323^2 + 6744^2 .

It is a cyclic number.

It is not a de Polignac number, because 56523865 - 2⁵ = 56523833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56523869) 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, 5652382 + ... + 5652391.

It is an arithmetic number, because the mean of its divisors is an integer number (16957161).

Almost surely, 2^56523865 is an apocalyptic number.

It is an amenable number.

56523865 is a deficient number, since it is larger than the sum of its proper divisors (11304779).

56523865 is a wasteful number, since it uses less digits than its factorization.

56523865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304778.

The product of its digits is 216000, while the sum is 40.

The square root of 56523865 is about 7518.2354977747. The cubic root of 56523865 is about 383.7755329664.

The spelling of 56523865 in words is "fifty-six million, five hundred twenty-three thousand, eight hundred sixty-five".