222172784 has 40 divisors (see below), whose sum is σ = 447971328. Its totient is φ = 106626240.

The previous prime is 222172781. The next prime is 222172789. The reversal of 222172784 is 487271222.

222172784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222172781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61229 + ... + 64755.

Almost surely, 2^222172784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222172784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223985664).

222172784 is an abundant number, since it is smaller than the sum of its proper divisors (225798544).

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

222172784 is a wasteful number, since it uses less digits than its factorization.

222172784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693 (or 3687 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 222172784 is about 14905.4615493785. The cubic root of 222172784 is about 605.6619433402.

The spelling of 222172784 in words is "two hundred twenty-two million, one hundred seventy-two thousand, seven hundred eighty-four".