565220 has 24 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 221792.

The previous prime is 565207. The next prime is 565237. The reversal of 565220 is 22565.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 565192 and 565201.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 941 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁵⁶⁵²²⁰ is an apocalyptic number.

It is an amenable number.

565220 is an abundant number, since it is smaller than the sum of its proper divisors (644380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565220 is a wasteful number, since it uses less digits than its factorization.

565220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 565220 is about 751.8111464989. The cubic root of 565220 is about 82.6810227698.

Adding to 565220 its reverse (22565), we get a palindrome (587785).

The spelling of 565220 in words is "five hundred sixty-five thousand, two hundred twenty".