22180216 has 16 divisors (see below), whose sum is σ = 42209640. Its totient is φ = 10924320.

The previous prime is 22180199. The next prime is 22180219. The reversal of 22180216 is 61208122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180219) 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, 20155 + ... + 21226.

Almost surely, 2^22180216 is an apocalyptic number.

It is an amenable number.

22180216 is a deficient number, since it is larger than the sum of its proper divisors (20029424).

22180216 is a wasteful number, since it uses less digits than its factorization.

22180216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41454 (or 41450 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 22180216 is about 4709.5876677263. The cubic root of 22180216 is about 280.9669629308.

Adding to 22180216 its reverse (61208122), we get a palindrome (83388338).

The spelling of 22180216 in words is "twenty-two million, one hundred eighty thousand, two hundred sixteen".