22289 has 4 divisors (see below), whose sum is σ = 23040. Its totient is φ = 21540.

The previous prime is 22283. The next prime is 22291. The reversal of 22289 is 98222.

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 a cyclic number.

It is not a de Polignac number, because 22289 - 2⁴ = 22273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22283) 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, 329 + ... + 390.

It is an arithmetic number, because the mean of its divisors is an integer number (5760).

2²²²⁸⁹ is an apocalyptic number.

It is an amenable number.

22289 is a deficient number, since it is larger than the sum of its proper divisors (751).

22289 is an equidigital number, since it uses as much as digits as its factorization.

22289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its digits is 576, while the sum is 23.

The square root of 22289 is about 149.2950099635. The cubic root of 22289 is about 28.1425552951.

The spelling of 22289 in words is "twenty-two thousand, two hundred eighty-nine".