22219999 has 2 divisors, whose sum is σ = 22220000. Its totient is φ = 22219998.

The previous prime is 22219993. The next prime is 22220027. The reversal of 22219999 is 99991222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22219999 - 2⁷ = 22219871 is a prime.

22219999 is a modest number, since divided by 9999 gives 2221 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22219993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109999 + 11110000.

It is an arithmetic number, because the mean of its divisors is an integer number (11110000).

Almost surely, 2^22219999 is an apocalyptic number.

22219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22219999 is an equidigital number, since it uses as much as digits as its factorization.

22219999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 43.

The square root of 22219999 is about 4713.8093936857. The cubic root of 22219999 is about 281.1348457633.

The spelling of 22219999 in words is "twenty-two million, two hundred nineteen thousand, nine hundred ninety-nine".