22569 has 4 divisors (see below), whose sum is σ = 30096. Its totient is φ = 15044.

The previous prime is 22567. The next prime is 22571. The reversal of 22569 is 96522.

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 an interprime number because it is at equal distance from previous prime (22567) and next prime (22571).

It is a cyclic number.

It is not a de Polignac number, because 22569 - 2¹ = 22567 is a prime.

It is a super-2 number, since 2×22569² = 1018719522, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

22569 is a lucky number.

It is a plaindrome in base 10.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (22567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3759 + ... + 3764.

It is an arithmetic number, because the mean of its divisors is an integer number (7524).

2²²⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

22569 is a deficient number, since it is larger than the sum of its proper divisors (7527).

22569 is an equidigital number, since it uses as much as digits as its factorization.

22569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526.

The product of its digits is 1080, while the sum is 24.

The square root of 22569 is about 150.2298239365. The cubic root of 22569 is about 28.2599098551.

The spelling of 22569 in words is "twenty-two thousand, five hundred sixty-nine".