22005239 has 4 divisors (see below), whose sum is σ = 22018656. Its totient is φ = 21991824.

The previous prime is 22005199. The next prime is 22005241. The reversal of 22005239 is 93250022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22005239 - 2¹² = 22001143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22005539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (5504664).

Almost surely, 2^22005239 is an apocalyptic number.

22005239 is a deficient number, since it is larger than the sum of its proper divisors (13417).

22005239 is a wasteful number, since it uses less digits than its factorization.

22005239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13416.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 22005239 is about 4690.9742058553. The cubic root of 22005239 is about 280.2261735488.

The spelling of 22005239 in words is "twenty-two million, five thousand, two hundred thirty-nine".