22917161 has 2 divisors, whose sum is σ = 22917162. Its totient is φ = 22917160.

The previous prime is 22917143. The next prime is 22917187. The reversal of 22917161 is 16171922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 10272025 = 3556^2 + 3205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22917161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22917101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11458580 + 11458581.

It is an arithmetic number, because the mean of its divisors is an integer number (11458581).

Almost surely, 2^22917161 is an apocalyptic number.

It is an amenable number.

22917161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22917161 is an equidigital number, since it uses as much as digits as its factorization.

22917161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 22917161 is about 4787.1871699360. The cubic root of 22917161 is about 284.0448624824.

The spelling of 22917161 in words is "twenty-two million, nine hundred seventeen thousand, one hundred sixty-one".