22157867 has 2 divisors, whose sum is σ = 22157868. Its totient is φ = 22157866.

The previous prime is 22157797. The next prime is 22157879. The reversal of 22157867 is 76875122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22157867 - 2¹⁸ = 21895723 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22157867.

It is not a weakly prime, because it can be changed into another prime (22157897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078933 + 11078934.

It is an arithmetic number, because the mean of its divisors is an integer number (11078934).

Almost surely, 2^22157867 is an apocalyptic number.

22157867 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157867 is an equidigital number, since it uses as much as digits as its factorization.

22157867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 22157867 is about 4707.2143567082. The cubic root of 22157867 is about 280.8725628752.

The spelling of 22157867 in words is "twenty-two million, one hundred fifty-seven thousand, eight hundred sixty-seven".