228123212 has 6 divisors (see below), whose sum is σ = 399215628. Its totient is φ = 114061604.

The previous prime is 228123209. The next prime is 228123239. The reversal of 228123212 is 212321822.

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 as a sum of consecutive naturals, namely, 28515398 + ... + 28515405.

It is an arithmetic number, because the mean of its divisors is an integer number (66535938).

Almost surely, 2^228123212 is an apocalyptic number.

It is an amenable number.

228123212 is a deficient number, since it is larger than the sum of its proper divisors (171092416).

228123212 is a wasteful number, since it uses less digits than its factorization.

228123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57030807 (or 57030805 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 228123212 is about 15103.7482765041. The cubic root of 228123212 is about 611.0215008466.

The spelling of 228123212 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, two hundred twelve".