172422222 has 64 divisors (see below), whose sum is σ = 406093824. Its totient is φ = 47789280.

The previous prime is 172422181. The next prime is 172422227. The reversal of 172422222 is 222224271.

172422222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

172422222 is a modest number, since divided by 22222 gives 1724 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 172422192 and 172422201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172422227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199363 + ... + 200225.

It is an arithmetic number, because the mean of its divisors is an integer number (6345216).

Almost surely, 2^172422222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172422222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203046912).

172422222 is an abundant number, since it is smaller than the sum of its proper divisors (233671602).

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

172422222 is a wasteful number, since it uses less digits than its factorization.

172422222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013.

The product of its digits is 1792, while the sum is 24.

The square root of 172422222 is about 13130.9642448679. The cubic root of 172422222 is about 556.5844633816.

Adding to 172422222 its reverse (222224271), we get a palindrome (394646493).

The spelling of 172422222 in words is "one hundred seventy-two million, four hundred twenty-two thousand, two hundred twenty-two".