216194972 has 12 divisors (see below), whose sum is σ = 432390000. Its totient is φ = 92654976.

The previous prime is 216194941. The next prime is 216194981. The reversal of 216194972 is 279491612.

216194972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

216194972 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3860597 + ... + 3860652.

It is an arithmetic number, because the mean of its divisors is an integer number (36032500).

Almost surely, 2^216194972 is an apocalyptic number.

It is an amenable number.

216194972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216194972 is a wasteful number, since it uses less digits than its factorization.

216194972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7721260 (or 7721258 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 216194972 is about 14703.5700426801. The cubic root of 216194972 is about 600.1804753386.

The spelling of 216194972 in words is "two hundred sixteen million, one hundred ninety-four thousand, nine hundred seventy-two".