252221224 has 16 divisors (see below), whose sum is σ = 480931200. Its totient is φ = 123972912.

The previous prime is 252221209. The next prime is 252221261. The reversal of 252221224 is 422122252.

It is a junction number, because it is equal to n+sod(n) for n = 252221195 and 252221204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266712 + ... + 267655.

It is an arithmetic number, because the mean of its divisors is an integer number (30058200).

Almost surely, 2^252221224 is an apocalyptic number.

It is an amenable number.

252221224 is a deficient number, since it is larger than the sum of its proper divisors (228709976).

252221224 is a wasteful number, since it uses less digits than its factorization.

252221224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534432 (or 534428 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 252221224 is about 15881.4742388734. The cubic root of 252221224 is about 631.8207377606.

Adding to 252221224 its reverse (422122252), we get a palindrome (674343476).

The spelling of 252221224 in words is "two hundred fifty-two million, two hundred twenty-one thousand, two hundred twenty-four".