565213 has 4 divisors (see below), whose sum is σ = 616608. Its totient is φ = 513820.

The previous prime is 565207. The next prime is 565237. The reversal of 565213 is 312565.

It is a happy number.

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 565213 - 2⁹ = 564701 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25681 + ... + 25702.

It is an arithmetic number, because the mean of its divisors is an integer number (154152).

2⁵⁶⁵²¹³ is an apocalyptic number.

It is an amenable number.

565213 is a deficient number, since it is larger than the sum of its proper divisors (51395).

565213 is a wasteful number, since it uses less digits than its factorization.

565213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51394.

The product of its digits is 900, while the sum is 22.

The square root of 565213 is about 751.8064910600. The cubic root of 565213 is about 82.6806814457.

Adding to 565213 its reverse (312565), we get a palindrome (877778).

It can be divided in two parts, 5652 and 13, that added together give a palindrome (5665).

The spelling of 565213 in words is "five hundred sixty-five thousand, two hundred thirteen".