22331899 has 2 divisors, whose sum is σ = 22331900. Its totient is φ = 22331898.

The previous prime is 22331891. The next prime is 22331923. The reversal of 22331899 is 99813322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22331899 - 2³ = 22331891 is a prime.

It is not a weakly prime, because it can be changed into another prime (22331891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11165949 + 11165950.

It is an arithmetic number, because the mean of its divisors is an integer number (11165950).

Almost surely, 2^22331899 is an apocalyptic number.

22331899 is a deficient number, since it is larger than the sum of its proper divisors (1).

22331899 is an equidigital number, since it uses as much as digits as its factorization.

22331899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 22331899 is about 4725.6638687067. The cubic root of 22331899 is about 281.6059878082.

The spelling of 22331899 in words is "twenty-two million, three hundred thirty-one thousand, eight hundred ninety-nine".