22173887 has 2 divisors, whose sum is σ = 22173888. Its totient is φ = 22173886.

The previous prime is 22173883. The next prime is 22173917. The reversal of 22173887 is 78837122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22173887 - 2² = 22173883 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22173887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22173883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11086943 + 11086944.

It is an arithmetic number, because the mean of its divisors is an integer number (11086944).

Almost surely, 2^22173887 is an apocalyptic number.

22173887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22173887 is an equidigital number, since it uses as much as digits as its factorization.

22173887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 22173887 is about 4708.9156925985. The cubic root of 22173887 is about 280.9402362739.

The spelling of 22173887 in words is "twenty-two million, one hundred seventy-three thousand, eight hundred eighty-seven".