22272917 has 2 divisors, whose sum is σ = 22272918. Its totient is φ = 22272916.

The previous prime is 22272893. The next prime is 22272923. The reversal of 22272917 is 71927222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18054001 + 4218916 = 4249^2 + 2054^2 .

It is a cyclic number.

It is not a de Polignac number, because 22272917 - 2⁸ = 22272661 is a 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 (22272937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11136458 + 11136459.

It is an arithmetic number, because the mean of its divisors is an integer number (11136459).

Almost surely, 2^22272917 is an apocalyptic number.

It is an amenable number.

22272917 is a deficient number, since it is larger than the sum of its proper divisors (1).

22272917 is an equidigital number, since it uses as much as digits as its factorization.

22272917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 22272917 is about 4719.4191379872. The cubic root of 22272917 is about 281.3578475615.

The spelling of 22272917 in words is "twenty-two million, two hundred seventy-two thousand, nine hundred seventeen".