565864081 has 4 divisors (see below), whose sum is σ = 565911792. Its totient is φ = 565816372.

The previous prime is 565864073. The next prime is 565864087. The reversal of 565864081 is 180468565.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 565864081 - 2³ = 565864073 is a prime.

It is a super-2 number, since 2×565864081² = 640404316331949122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565864087) 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, 9246 + ... + 34888.

It is an arithmetic number, because the mean of its divisors is an integer number (141477948).

Almost surely, 2^565864081 is an apocalyptic number.

It is an amenable number.

565864081 is a deficient number, since it is larger than the sum of its proper divisors (47711).

565864081 is a wasteful number, since it uses less digits than its factorization.

565864081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47710.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 565864081 is about 23787.8977843777. The cubic root of 565864081 is about 827.1241648128.

The spelling of 565864081 in words is "five hundred sixty-five million, eight hundred sixty-four thousand, eighty-one".