565631 has 4 divisors (see below), whose sum is σ = 617064. Its totient is φ = 514200.

The previous prime is 565613. The next prime is 565637. The reversal of 565631 is 136565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 565631 - 2⁶ = 565567 is a prime.

It is a super-2 number, since 2×565631² = 639876856322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 565631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25700 + ... + 25721.

It is an arithmetic number, because the mean of its divisors is an integer number (154266).

2⁵⁶⁵⁶³¹ is an apocalyptic number.

565631 is a deficient number, since it is larger than the sum of its proper divisors (51433).

565631 is a wasteful number, since it uses less digits than its factorization.

565631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51432.

The product of its digits is 2700, while the sum is 26.

The square root of 565631 is about 752.0844367490. The cubic root of 565631 is about 82.7010584297.

The spelling of 565631 in words is "five hundred sixty-five thousand, six hundred thirty-one".