225443222172 has 36 divisors (see below), whose sum is σ = 651280420336. Its totient is φ = 64412349120.

The previous prime is 225443222161. The next prime is 225443222197. The reversal of 225443222172 is 271222344522.

225443222172 is a `hidden beast` number, since 2 + 2 + 5 + 4 + 432 + 2 + 217 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×225443222172³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447307729 + ... + 447308232.

Almost surely, 2^225443222172 is an apocalyptic number.

It is an amenable number.

225443222172 is an abundant number, since it is smaller than the sum of its proper divisors (425837198164).

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

225443222172 is a wasteful number, since it uses less digits than its factorization.

225443222172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894615978 (or 894615973 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

Adding to 225443222172 its reverse (271222344522), we get a palindrome (496665566694).

The spelling of 225443222172 in words is "two hundred twenty-five billion, four hundred forty-three million, two hundred twenty-two thousand, one hundred seventy-two".