216828205 has 8 divisors (see below), whose sum is σ = 283847904. Its totient is φ = 157693200.

The previous prime is 216828203. The next prime is 216828223. The reversal of 216828205 is 502828612.

216828205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216828205 - 2¹ = 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 7 ways as a sum of consecutive naturals, for example, 1971111 + ... + 1971220.

It is an arithmetic number, because the mean of its divisors is an integer number (35480988).

Almost surely, 2^216828205 is an apocalyptic number.

It is an amenable number.

216828205 is a deficient number, since it is larger than the sum of its proper divisors (67019699).

216828205 is a wasteful number, since it uses less digits than its factorization.

216828205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942347.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 216828205 is about 14725.0876058515. The cubic root of 216828205 is about 600.7658784492.

The spelling of 216828205 in words is "two hundred sixteen million, eight hundred twenty-eight thousand, two hundred five".