216828207 has 12 divisors (see below), whose sum is σ = 313324024. Its totient is φ = 144493200.

The previous prime is 216828203. The next prime is 216828223. The reversal of 216828207 is 702828612.

It is a happy number.

It is not a de Polignac number, because 216828207 - 2² = 216828203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216828203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39957 + ... + 45057.

Almost surely, 2^216828207 is an apocalyptic number.

216828207 is a deficient number, since it is larger than the sum of its proper divisors (96495817).

216828207 is a wasteful number, since it uses less digits than its factorization.

216828207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830 (or 9827 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 216828207 is about 14725.0876737628. The cubic root of 216828207 is about 600.7658802963.

The spelling of 216828207 in words is "two hundred sixteen million, eight hundred twenty-eight thousand, two hundred seven".