22157879 has 2 divisors, whose sum is σ = 22157880. Its totient is φ = 22157878.

The previous prime is 22157867. The next prime is 22157897. The reversal of 22157879 is 97875122.

Together with next prime (22157897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22157879 - 2⁸ = 22157623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078939 + 11078940.

It is an arithmetic number, because the mean of its divisors is an integer number (11078940).

Almost surely, 2^22157879 is an apocalyptic number.

22157879 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157879 is an equidigital number, since it uses as much as digits as its factorization.

22157879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 22157879 is about 4707.2156313473. The cubic root of 22157879 is about 280.8726135791.

The spelling of 22157879 in words is "twenty-two million, one hundred fifty-seven thousand, eight hundred seventy-nine".