218368243 has 8 divisors (see below), whose sum is σ = 221523120. Its totient is φ = 215232000.

The previous prime is 218368237. The next prime is 218368261. The reversal of 218368243 is 342863812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218368243 - 2⁹ = 218367731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218768243) 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 7 ways as a sum of consecutive naturals, for example, 19863 + ... + 28831.

It is an arithmetic number, because the mean of its divisors is an integer number (27690390).

Almost surely, 2^218368243 is an apocalyptic number.

218368243 is a deficient number, since it is larger than the sum of its proper divisors (3154877).

218368243 is an equidigital number, since it uses as much as digits as its factorization.

218368243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317.

The product of its digits is 55296, while the sum is 37.

The square root of 218368243 is about 14777.2880800233. The cubic root of 218368243 is about 602.1848519720.

The spelling of 218368243 in words is "two hundred eighteen million, three hundred sixty-eight thousand, two hundred forty-three".