212222224 has 10 divisors (see below), whose sum is σ = 411180590. Its totient is φ = 106111104.

The previous prime is 212222189. The next prime is 212222291. The reversal of 212222224 is 422222212.

It can be written as a sum of positive squares in only one way, i.e., 145636624 + 66585600 = 12068^2 + 8160^2 .

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6631929 + ... + 6631960.

It is an arithmetic number, because the mean of its divisors is an integer number (41118059).

Almost surely, 2^212222224 is an apocalyptic number.

It is an amenable number.

212222224 is a deficient number, since it is larger than the sum of its proper divisors (198958366).

212222224 is a wasteful number, since it uses less digits than its factorization.

212222224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13263897 (or 13263891 counting only the distinct ones).

The product of its digits is 512, while the sum is 19.

The square root of 212222224 is about 14567.8489832919. The cubic root of 212222224 is about 596.4814661246.

Adding to 212222224 its reverse (422222212), we get a palindrome (634444436).

The spelling of 212222224 in words is "two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-four".