22200005172 has 12 divisors (see below), whose sum is σ = 51800012096. Its totient is φ = 7400001720.

The previous prime is 22200005161. The next prime is 22200005173. The reversal of 22200005172 is 27150000222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200005173) 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, 925000204 + ... + 925000227.

Almost surely, 2^22200005172 is an apocalyptic number.

It is an amenable number.

22200005172 is an abundant number, since it is smaller than the sum of its proper divisors (29600006924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22200005172 is a wasteful number, since it uses less digits than its factorization.

22200005172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850000438 (or 1850000436 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

Adding to 22200005172 its reverse (27150000222), we get a palindrome (49350005394).

The spelling of 22200005172 in words is "twenty-two billion, two hundred million, five thousand, one hundred seventy-two".