22256879 has 2 divisors, whose sum is σ = 22256880. Its totient is φ = 22256878.

The previous prime is 22256851. The next prime is 22256933. The reversal of 22256879 is 97865222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22256879 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22256849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11128439 + 11128440.

It is an arithmetic number, because the mean of its divisors is an integer number (11128440).

Almost surely, 2^22256879 is an apocalyptic number.

22256879 is a deficient number, since it is larger than the sum of its proper divisors (1).

22256879 is an equidigital number, since it uses as much as digits as its factorization.

22256879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 22256879 is about 4717.7196822194. The cubic root of 22256879 is about 281.2902991472.

The spelling of 22256879 in words is "twenty-two million, two hundred fifty-six thousand, eight hundred seventy-nine".