22819919 has 2 divisors, whose sum is σ = 22819920. Its totient is φ = 22819918.

The previous prime is 22819871. The next prime is 22819939. The reversal of 22819919 is 91991822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22819919 - 2⁸ = 22819663 is a prime.

It is a super-2 number, since 2×22819919² = 1041497406333122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22819939) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11409959 + 11409960.

It is an arithmetic number, because the mean of its divisors is an integer number (11409960).

Almost surely, 2^22819919 is an apocalyptic number.

22819919 is a deficient number, since it is larger than the sum of its proper divisors (1).

22819919 is an equidigital number, since it uses as much as digits as its factorization.

22819919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 41.

The square root of 22819919 is about 4777.0198869169. The cubic root of 22819919 is about 283.6425402502.

The spelling of 22819919 in words is "twenty-two million, eight hundred nineteen thousand, nine hundred nineteen".