22912217 has 2 divisors, whose sum is σ = 22912218. Its totient is φ = 22912216.

The previous prime is 22912187. The next prime is 22912223. The reversal of 22912217 is 71221922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 292681 = 4756^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 22912217 - 2⁸ = 22911961 is a prime.

It is not a weakly prime, because it can be changed into another prime (22912717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11456108 + 11456109.

It is an arithmetic number, because the mean of its divisors is an integer number (11456109).

Almost surely, 2^22912217 is an apocalyptic number.

It is an amenable number.

22912217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22912217 is an equidigital number, since it uses as much as digits as its factorization.

22912217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 22912217 is about 4786.6707636937. The cubic root of 22912217 is about 284.0244350132.

The spelling of 22912217 in words is "twenty-two million, nine hundred twelve thousand, two hundred seventeen".