22329991 has 2 divisors, whose sum is σ = 22329992. Its totient is φ = 22329990.

The previous prime is 22329977. The next prime is 22330003. The reversal of 22329991 is 19992322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22329991 - 2⁷ = 22329863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22329991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22329091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11164995 + 11164996.

It is an arithmetic number, because the mean of its divisors is an integer number (11164996).

Almost surely, 2^22329991 is an apocalyptic number.

22329991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22329991 is an equidigital number, since it uses as much as digits as its factorization.

22329991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 37.

The square root of 22329991 is about 4725.4619879965. The cubic root of 22329991 is about 281.5979675987.

The spelling of 22329991 in words is "twenty-two million, three hundred twenty-nine thousand, nine hundred ninety-one".