216218204 has 12 divisors (see below), whose sum is σ = 378486528. Its totient is φ = 108079200.

The previous prime is 216218203. The next prime is 216218213. The reversal of 216218204 is 402812612.

It is a happy number.

216218204 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216218203) 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, 20069 + ... + 28899.

It is an arithmetic number, because the mean of its divisors is an integer number (31540544).

Almost surely, 2^216218204 is an apocalyptic number.

It is an amenable number.

216218204 is a deficient number, since it is larger than the sum of its proper divisors (162268324).

216218204 is a wasteful number, since it uses less digits than its factorization.

216218204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14956 (or 14954 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 216218204 is about 14704.3600336771. The cubic root of 216218204 is about 600.2019727448.

The spelling of 216218204 in words is "two hundred sixteen million, two hundred eighteen thousand, two hundred four".