212257228 has 12 divisors (see below), whose sum is σ = 375926040. Its totient is φ = 104849792.

The previous prime is 212257219. The next prime is 212257229. The reversal of 212257228 is 822752212.

212257228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212257228.

It is not an unprimeable number, because it can be changed into a prime (212257229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319333 + ... + 319996.

It is an arithmetic number, because the mean of its divisors is an integer number (31327170).

Almost surely, 2^212257228 is an apocalyptic number.

It is an amenable number.

212257228 is a deficient number, since it is larger than the sum of its proper divisors (163668812).

212257228 is a wasteful number, since it uses less digits than its factorization.

212257228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639416 (or 639414 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 212257228 is about 14569.0503465394. The cubic root of 212257228 is about 596.5142589349.

The spelling of 212257228 in words is "two hundred twelve million, two hundred fifty-seven thousand, two hundred twenty-eight".