210000222 has 16 divisors (see below), whose sum is σ = 466667280. Its totient is φ = 70000056.

The previous prime is 210000199. The next prime is 210000239. The reversal of 210000222 is 222000012.

It is a Harshad number since it is a multiple of its sum of digits (9).

210000222 is a modest number, since divided by 222 gives 210 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 7 ways as a sum of consecutive naturals, for example, 1944393 + ... + 1944500.

It is an arithmetic number, because the mean of its divisors is an integer number (29166705).

Almost surely, 2^210000222 is an apocalyptic number.

210000222 is an abundant number, since it is smaller than the sum of its proper divisors (256667058).

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

210000222 is a wasteful number, since it uses less digits than its factorization.

210000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888904 (or 3888898 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 210000222 is about 14491.3844059151. The cubic root of 210000222 is about 594.3924047287.

Adding to 210000222 its reverse (222000012), we get a palindrome (432000234).

The spelling of 210000222 in words is "two hundred ten million, two hundred twenty-two", and thus it is an aban number.