22775 has 6 divisors (see below), whose sum is σ = 28272. Its totient is φ = 18200.

The previous prime is 22769. The next prime is 22777. The reversal of 22775 is 57722.

It is not a de Polignac number, because 22775 - 2¹⁰ = 21751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431 + ... + 480.

It is an arithmetic number, because the mean of its divisors is an integer number (4712).

2²²⁷⁷⁵ is an apocalyptic number.

22775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22775 is a deficient number, since it is larger than the sum of its proper divisors (5497).

22775 is an equidigital number, since it uses as much as digits as its factorization.

22775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 916 counting only the distinct ones).

The product of its digits is 980, while the sum is 23.

The square root of 22775 is about 150.9138827279. The cubic root of 22775 is about 28.3456309554.

It can be divided in two parts, 22 and 775, that added together give a palindrome (797).

The spelling of 22775 in words is "twenty-two thousand, seven hundred seventy-five".