216684850 has 12 divisors (see below), whose sum is σ = 403033914. Its totient is φ = 86673920.

The previous prime is 216684833. The next prime is 216684851. The reversal of 216684850 is 58486612.

216684850 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 210569121 + 6115729 = 14511^2 + 2473^2 .

It is not an unprimeable number, because it can be changed into a prime (216684851) 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, 2166799 + ... + 2166898.

Almost surely, 2^216684850 is an apocalyptic number.

216684850 is a deficient number, since it is larger than the sum of its proper divisors (186349064).

216684850 is a wasteful number, since it uses less digits than its factorization.

216684850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333709 (or 4333704 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 216684850 is about 14720.2190880435. The cubic root of 216684850 is about 600.6334513673.

The spelling of 216684850 in words is "two hundred sixteen million, six hundred eighty-four thousand, eight hundred fifty".