565166813 has 4 divisors (see below), whose sum is σ = 565267200. Its totient is φ = 565066428.

The previous prime is 565166801. The next prime is 565166839. The reversal of 565166813 is 318661565.

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 565166813 - 2¹⁰ = 565165789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565166843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41213 + ... + 53186.

It is an arithmetic number, because the mean of its divisors is an integer number (141316800).

Almost surely, 2^565166813 is an apocalyptic number.

It is an amenable number.

565166813 is a deficient number, since it is larger than the sum of its proper divisors (100387).

565166813 is an equidigital number, since it uses as much as digits as its factorization.

565166813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100386.

The product of its digits is 129600, while the sum is 41.

The square root of 565166813 is about 23773.2373268766. The cubic root of 565166813 is about 826.7842927019.

The spelling of 565166813 in words is "five hundred sixty-five million, one hundred sixty-six thousand, eight hundred thirteen".