22199887 has 2 divisors, whose sum is σ = 22199888. Its totient is φ = 22199886.

The previous prime is 22199857. The next prime is 22199929. The reversal of 22199887 is 78899122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22199887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22199857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099943 + 11099944.

It is an arithmetic number, because the mean of its divisors is an integer number (11099944).

Almost surely, 2^22199887 is an apocalyptic number.

22199887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22199887 is an equidigital number, since it uses as much as digits as its factorization.

22199887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 22199887 is about 4711.6756042835. The cubic root of 22199887 is about 281.0499989128.

The spelling of 22199887 in words is "twenty-two million, one hundred ninety-nine thousand, eight hundred eighty-seven".