216344833 has 4 divisors (see below), whose sum is σ = 216694960. Its totient is φ = 215994708.

The previous prime is 216344819. The next prime is 216344837. The reversal of 216344833 is 338443612.

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 216344833 - 2⁵ = 216344801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216344837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174135 + ... + 175372.

It is an arithmetic number, because the mean of its divisors is an integer number (54173740).

Almost surely, 2^216344833 is an apocalyptic number.

It is an amenable number.

216344833 is a deficient number, since it is larger than the sum of its proper divisors (350127).

216344833 is an equidigital number, since it uses as much as digits as its factorization.

216344833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350126.

The product of its digits is 41472, while the sum is 34.

The square root of 216344833 is about 14708.6652351599. The cubic root of 216344833 is about 600.3191200554.

The spelling of 216344833 in words is "two hundred sixteen million, three hundred forty-four thousand, eight hundred thirty-three".