212200218 has 12 divisors (see below), whose sum is σ = 459767178. Its totient is φ = 70733400.

The previous prime is 212200211. The next prime is 212200223. The reversal of 212200218 is 812002212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 130713489 + 81486729 = 11433^2 + 9027^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11788901 = 212200218 / (2 + 1 + 2 + 2 + 0 + 0 + 2 + 1 + 8).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212200218.

It is not an unprimeable number, because it can be changed into a prime (212200211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5894433 + ... + 5894468.

Almost surely, 2^212200218 is an apocalyptic number.

212200218 is an abundant number, since it is smaller than the sum of its proper divisors (247566960).

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

212200218 is a wasteful number, since it uses less digits than its factorization.

212200218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11788909 (or 11788906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 212200218 is about 14567.0936703242. The cubic root of 212200218 is about 596.4608483894.

The spelling of 212200218 in words is "two hundred twelve million, two hundred thousand, two hundred eighteen".