565513 has 8 divisors (see below), whose sum is σ = 624456. Its totient is φ = 508800.

The previous prime is 565511. The next prime is 565517. The reversal of 565513 is 315565.

It can be written as a sum of positive squares in 4 ways, for example, as 9 + 565504 = 3^2 + 752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 565513 - 2¹ = 565511 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 (565511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (78057).

2⁵⁶⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

565513 is a deficient number, since it is larger than the sum of its proper divisors (58943).

565513 is a wasteful number, since it uses less digits than its factorization.

565513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

The product of its digits is 2250, while the sum is 25.

The square root of 565513 is about 752.0059840187. The cubic root of 565513 is about 82.6953070926.

It can be divided in two parts, 56551 and 3, that multiplied together give a triangular number (169653 = T₅₈₂).

The spelling of 565513 in words is "five hundred sixty-five thousand, five hundred thirteen".