22138279 has 2 divisors, whose sum is σ = 22138280. Its totient is φ = 22138278.

The previous prime is 22138243. The next prime is 22138283. The reversal of 22138279 is 97283122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22138279 - 2⁹ = 22137767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22138219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11069139 + 11069140.

It is an arithmetic number, because the mean of its divisors is an integer number (11069140).

Almost surely, 2^22138279 is an apocalyptic number.

22138279 is a deficient number, since it is larger than the sum of its proper divisors (1).

22138279 is an equidigital number, since it uses as much as digits as its factorization.

22138279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 22138279 is about 4705.1332605995. The cubic root of 22138279 is about 280.7897728098.

The spelling of 22138279 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred seventy-nine".