565264217 has 4 divisors (see below), whose sum is σ = 646016256. Its totient is φ = 484512180.

The previous prime is 565264177. The next prime is 565264237. The reversal of 565264217 is 712462565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 565264217 - 2⁸ = 565263961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565264237) 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, 40376009 + ... + 40376022.

It is an arithmetic number, because the mean of its divisors is an integer number (161504064).

Almost surely, 2^565264217 is an apocalyptic number.

It is an amenable number.

565264217 is a deficient number, since it is larger than the sum of its proper divisors (80752039).

565264217 is an equidigital number, since it uses as much as digits as its factorization.

565264217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80752038.

The product of its digits is 100800, while the sum is 38.

The square root of 565264217 is about 23775.2858447590. The cubic root of 565264217 is about 826.8317875119.

The spelling of 565264217 in words is "five hundred sixty-five million, two hundred sixty-four thousand, two hundred seventeen".