22163887 has 2 divisors, whose sum is σ = 22163888. Its totient is φ = 22163886.

The previous prime is 22163839. The next prime is 22163891. The reversal of 22163887 is 78836122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22163887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22163807) 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, 11081943 + 11081944.

It is an arithmetic number, because the mean of its divisors is an integer number (11081944).

Almost surely, 2^22163887 is an apocalyptic number.

22163887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22163887 is an equidigital number, since it uses as much as digits as its factorization.

22163887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 22163887 is about 4707.8537572869. The cubic root of 22163887 is about 280.8979970280.

The spelling of 22163887 in words is "twenty-two million, one hundred sixty-three thousand, eight hundred eighty-seven".