22189871 has 16 divisors (see below), whose sum is σ = 25436160. Its totient is φ = 19161120.

The previous prime is 22189861. The next prime is 22189877. The reversal of 22189871 is 17898122.

It is not a de Polignac number, because 22189871 - 2¹⁸ = 21927727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22189877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57746 + ... + 58128.

It is an arithmetic number, because the mean of its divisors is an integer number (1589760).

Almost surely, 2^22189871 is an apocalyptic number.

22189871 is a deficient number, since it is larger than the sum of its proper divisors (3246289).

22189871 is a wasteful number, since it uses less digits than its factorization.

22189871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

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

The square root of 22189871 is about 4710.6125928588. The cubic root of 22189871 is about 281.0077251204.

The spelling of 22189871 in words is "twenty-two million, one hundred eighty-nine thousand, eight hundred seventy-one".