252222222 has 32 divisors (see below), whose sum is σ = 596390400. Its totient is φ = 69578208.

The previous prime is 252222211. The next prime is 252222259. The reversal of 252222222 is 222222252.

It is a Harshad number since it is a multiple of its sum of digits (21).

252222222 is a modest number, since divided by 22222 gives 2522 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102322 + ... + 104757.

It is an arithmetic number, because the mean of its divisors is an integer number (18637200).

Almost surely, 2^252222222 is an apocalyptic number.

252222222 is an abundant number, since it is smaller than the sum of its proper divisors (344168178).

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

252222222 is a wasteful number, since it uses less digits than its factorization.

252222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207120.

The product of its digits is 1280, while the sum is 21.

The square root of 252222222 is about 15881.5056590992. The cubic root of 252222222 is about 631.8215710982.

Adding to 252222222 its reverse (222222252), we get a palindrome (474444474).

The spelling of 252222222 in words is "two hundred fifty-two million, two hundred twenty-two thousand, two hundred twenty-two".