218002233817 has 4 divisors (see below), whose sum is σ = 218161013220. Its totient is φ = 217843454416.

The previous prime is 218002233781. The next prime is 218002233863. The reversal of 218002233817 is 718332200812.

218002233817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172321293456 + 45680940361 = 415116^2 + 213731^2 .

It is a cyclic number.

It is not a de Polignac number, because 218002233817 - 2¹⁹ = 218001709529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218002233887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79387642 + ... + 79390387.

It is an arithmetic number, because the mean of its divisors is an integer number (54540253305).

Almost surely, 2^218002233817 is an apocalyptic number.

It is an amenable number.

218002233817 is a deficient number, since it is larger than the sum of its proper divisors (158779403).

218002233817 is a wasteful number, since it uses less digits than its factorization.

218002233817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158779402.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 218002233817 in words is "two hundred eighteen billion, two million, two hundred thirty-three thousand, eight hundred seventeen".