22239 has 12 divisors (see below), whose sum is σ = 36816. Its totient is φ = 12672.

The previous prime is 22229. The next prime is 22247. The reversal of 22239 is 93222.

It is not a de Polignac number, because 22239 - 2⁷ = 22111 is a prime.

It is a plaindrome in base 10, base 11 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22229) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 114 + ... + 239.

It is an arithmetic number, because the mean of its divisors is an integer number (3068).

2²²²³⁹ is an apocalyptic number.

22239 is a deficient number, since it is larger than the sum of its proper divisors (14577).

22239 is a wasteful number, since it uses less digits than its factorization.

22239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 363 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 22239 is about 149.1274622596. The cubic root of 22239 is about 28.1214958597.

The spelling of 22239 in words is "twenty-two thousand, two hundred thirty-nine".