216839799 has 24 divisors (see below), whose sum is σ = 359673600. Its totient is φ = 124500240.

The previous prime is 216839789. The next prime is 216839803. The reversal of 216839799 is 997938612.

216839799 is a `hidden beast` number, since 2 + 168 + 397 + 99 = 666.

It is not a de Polignac number, because 216839799 - 2¹⁶ = 216774263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216839759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55759 + ... + 59520.

It is an arithmetic number, because the mean of its divisors is an integer number (14986400).

Almost surely, 2^216839799 is an apocalyptic number.

216839799 is a deficient number, since it is larger than the sum of its proper divisors (142833801).

216839799 is a wasteful number, since it uses less digits than its factorization.

216839799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115315 (or 115312 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 216839799 is about 14725.4812824573. The cubic root of 216839799 is about 600.7765860898.

The spelling of 216839799 in words is "two hundred sixteen million, eight hundred thirty-nine thousand, seven hundred ninety-nine".