22158239 has 2 divisors, whose sum is σ = 22158240. Its totient is φ = 22158238.

The previous prime is 22158229. The next prime is 22158247. The reversal of 22158239 is 93285122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22158239 - 2¹⁶ = 22092703 is a prime.

It is a super-2 number, since 2×22158239² = 981975111162242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22158229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11079119 + 11079120.

It is an arithmetic number, because the mean of its divisors is an integer number (11079120).

Almost surely, 2^22158239 is an apocalyptic number.

22158239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22158239 is an equidigital number, since it uses as much as digits as its factorization.

22158239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 22158239 is about 4707.2538703580. The cubic root of 22158239 is about 280.8741346873.

The spelling of 22158239 in words is "twenty-two million, one hundred fifty-eight thousand, two hundred thirty-nine".