216843193 has 16 divisors (see below), whose sum is σ = 253725696. Its totient is φ = 181471680.

The previous prime is 216843191. The next prime is 216843247. The reversal of 216843193 is 391348612.

It is a cyclic number.

It is not a de Polignac number, because 216843193 - 2¹ = 216843191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216843191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81423 + ... + 84043.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^216843193 is an apocalyptic number.

It is an amenable number.

216843193 is a deficient number, since it is larger than the sum of its proper divisors (36882503).

216843193 is a wasteful number, since it uses less digits than its factorization.

216843193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904.

The product of its digits is 31104, while the sum is 37.

The square root of 216843193 is about 14725.5965244196. The cubic root of 216843193 is about 600.7797205468.

The spelling of 216843193 in words is "two hundred sixteen million, eight hundred forty-three thousand, one hundred ninety-three".