22188329 has 2 divisors, whose sum is σ = 22188330. Its totient is φ = 22188328.

The previous prime is 22188317. The next prime is 22188347. The reversal of 22188329 is 92388122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11916304 + 10272025 = 3452^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 22188329 - 2⁸ = 22188073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22188359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11094164 + 11094165.

It is an arithmetic number, because the mean of its divisors is an integer number (11094165).

Almost surely, 2^22188329 is an apocalyptic number.

It is an amenable number.

22188329 is a deficient number, since it is larger than the sum of its proper divisors (1).

22188329 is an equidigital number, since it uses as much as digits as its factorization.

22188329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 22188329 is about 4710.4489170354. The cubic root of 22188329 is about 281.0012157848.

The spelling of 22188329 in words is "twenty-two million, one hundred eighty-eight thousand, three hundred twenty-nine".