22187216 has 20 divisors (see below), whose sum is σ = 43595424. Its totient is φ = 10936800.

The previous prime is 22187213. The next prime is 22187219. The reversal of 22187216 is 61278122.

It is an interprime number because it is at equal distance from previous prime (22187213) and next prime (22187219).

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22187213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8630 + ... + 10901.

Almost surely, 2^22187216 is an apocalyptic number.

It is an amenable number.

22187216 is a deficient number, since it is larger than the sum of its proper divisors (21408208).

22187216 is a wasteful number, since it uses less digits than its factorization.

22187216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19610 (or 19604 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 22187216 is about 4710.3307739478. The cubic root of 22187216 is about 280.9965172249.

The spelling of 22187216 in words is "twenty-two million, one hundred eighty-seven thousand, two hundred sixteen".