216893333 has 4 divisors (see below), whose sum is σ = 221937408. Its totient is φ = 211849260.

The previous prime is 216893317. The next prime is 216893353. The reversal of 216893333 is 333398612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216893333 - 2⁴ = 216893317 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 (216893353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521973 + ... + 2522058.

It is an arithmetic number, because the mean of its divisors is an integer number (55484352).

Almost surely, 2^216893333 is an apocalyptic number.

It is an amenable number.

216893333 is a deficient number, since it is larger than the sum of its proper divisors (5044075).

216893333 is an equidigital number, since it uses as much as digits as its factorization.

216893333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044074.

The product of its digits is 69984, while the sum is 38.

The square root of 216893333 is about 14727.2989037366. The cubic root of 216893333 is about 600.8260224748.

The spelling of 216893333 in words is "two hundred sixteen million, eight hundred ninety-three thousand, three hundred thirty-three".