22442279 has 2 divisors, whose sum is σ = 22442280. Its totient is φ = 22442278.

The previous prime is 22442269. The next prime is 22442281. The reversal of 22442279 is 97224422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22442279 is a prime.

Together with 22442281, 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 (22442209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11221139 + 11221140.

It is an arithmetic number, because the mean of its divisors is an integer number (11221140).

Almost surely, 2^22442279 is an apocalyptic number.

22442279 is a deficient number, since it is larger than the sum of its proper divisors (1).

22442279 is an equidigital number, since it uses as much as digits as its factorization.

22442279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 22442279 is about 4737.3282554621. The cubic root of 22442279 is about 282.0691906409.

The spelling of 22442279 in words is "twenty-two million, four hundred forty-two thousand, two hundred seventy-nine".