22155239 has 2 divisors, whose sum is σ = 22155240. Its totient is φ = 22155238.

The previous prime is 22155227. The next prime is 22155241. The reversal of 22155239 is 93255122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22155239 - 2⁴ = 22155223 is a prime.

Together with 22155241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077619 + 11077620.

It is an arithmetic number, because the mean of its divisors is an integer number (11077620).

Almost surely, 2^22155239 is an apocalyptic number.

22155239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155239 is an equidigital number, since it uses as much as digits as its factorization.

22155239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 22155239 is about 4706.9352024433. The cubic root of 22155239 is about 280.8614582823.

The spelling of 22155239 in words is "twenty-two million, one hundred fifty-five thousand, two hundred thirty-nine".