565523 has 4 divisors (see below), whose sum is σ = 646320. Its totient is φ = 484728.

The previous prime is 565519. The next prime is 565549. The reversal of 565523 is 325565.

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 565523 - 2² = 565519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 565492 and 565501.

It is not an unprimeable number, because it can be changed into a prime (565553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40388 + ... + 40401.

It is an arithmetic number, because the mean of its divisors is an integer number (161580).

2⁵⁶⁵⁵²³ is an apocalyptic number.

565523 is a deficient number, since it is larger than the sum of its proper divisors (80797).

565523 is an equidigital number, since it uses as much as digits as its factorization.

565523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80796.

The product of its digits is 4500, while the sum is 26.

The square root of 565523 is about 752.0126328726. The cubic root of 565523 is about 82.6957945251.

The spelling of 565523 in words is "five hundred sixty-five thousand, five hundred twenty-three".