216842933 has 2 divisors, whose sum is σ = 216842934. Its totient is φ = 216842932.

The previous prime is 216842921. The next prime is 216842959. The reversal of 216842933 is 339248612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214974244 + 1868689 = 14662^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 216842933 - 2⁸ = 216842677 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216842333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108421466 + 108421467.

It is an arithmetic number, because the mean of its divisors is an integer number (108421467).

Almost surely, 2^216842933 is an apocalyptic number.

It is an amenable number.

216842933 is a deficient number, since it is larger than the sum of its proper divisors (1).

216842933 is an equidigital number, since it uses as much as digits as its factorization.

216842933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 216842933 is about 14725.5876962517. The cubic root of 216842933 is about 600.7794804304.

The spelling of 216842933 in words is "two hundred sixteen million, eight hundred forty-two thousand, nine hundred thirty-three".