204218212 has 48 divisors (see below), whose sum is σ = 422936640. Its totient is φ = 85222400.

The previous prime is 204218197. The next prime is 204218237. The reversal of 204218212 is 212812402.

It is a super-2 number, since 2×204218212² = 83410156224953888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 15 ways as a sum of consecutive naturals, for example, 27339 + ... + 33997.

It is an arithmetic number, because the mean of its divisors is an integer number (8811180).

Almost surely, 2^204218212 is an apocalyptic number.

204218212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

204218212 is an abundant number, since it is smaller than the sum of its proper divisors (218718428).

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

204218212 is a wasteful number, since it uses less digits than its factorization.

204218212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732 (or 6730 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 204218212 is about 14290.4937633379. The cubic root of 204218212 is about 588.8863527810.

The spelling of 204218212 in words is "two hundred four million, two hundred eighteen thousand, two hundred twelve".