22189187 has 8 divisors (see below), whose sum is σ = 22503936. Its totient is φ = 21876552.

The previous prime is 22189151. The next prime is 22189201. The reversal of 22189187 is 78198122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22189187 - 2¹⁰ = 22188163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22189187.

It is not an unprimeable number, because it can be changed into a prime (22189117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37508 + ... + 38094.

It is an arithmetic number, because the mean of its divisors is an integer number (2812992).

Almost surely, 2^22189187 is an apocalyptic number.

22189187 is a deficient number, since it is larger than the sum of its proper divisors (314749).

22189187 is a wasteful number, since it uses less digits than its factorization.

22189187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057.

The product of its digits is 16128, while the sum is 38.

The square root of 22189187 is about 4710.5399902771. The cubic root of 22189187 is about 281.0048377480.

The spelling of 22189187 in words is "twenty-two million, one hundred eighty-nine thousand, one hundred eighty-seven".