22166279 has 2 divisors, whose sum is σ = 22166280. Its totient is φ = 22166278.

The previous prime is 22166269. The next prime is 22166297. The reversal of 22166279 is 97266122.

Together with next prime (22166297) 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 a de Polignac number, because none of the positive numbers 2^k-22166279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22166269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11083139 + 11083140.

It is an arithmetic number, because the mean of its divisors is an integer number (11083140).

Almost surely, 2^22166279 is an apocalyptic number.

22166279 is a deficient number, since it is larger than the sum of its proper divisors (1).

22166279 is an equidigital number, since it uses as much as digits as its factorization.

22166279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 22166279 is about 4708.1077940081. The cubic root of 22166279 is about 280.9081018115.

The spelling of 22166279 in words is "twenty-two million, one hundred sixty-six thousand, two hundred seventy-nine".