216216198 has 48 divisors (see below), whose sum is σ = 512128656. Its totient is φ = 65382720.

The previous prime is 216216193. The next prime is 216216239. The reversal of 216216198 is 891612612.

216216198 is a `hidden beast` number, since 2 + 16 + 21 + 619 + 8 = 666.

216216198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216216191) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 133240 + ... + 134852.

It is an arithmetic number, because the mean of its divisors is an integer number (10669347).

Almost surely, 2^216216198 is an apocalyptic number.

216216198 is an abundant number, since it is smaller than the sum of its proper divisors (295912458).

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

216216198 is a wasteful number, since it uses less digits than its factorization.

216216198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2306 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 216216198 is about 14704.2918224578. The cubic root of 216216198 is about 600.2001165815.

The spelling of 216216198 in words is "two hundred sixteen million, two hundred sixteen thousand, one hundred ninety-eight".