218323017 has 12 divisors (see below), whose sum is σ = 344024304. Its totient is φ = 132316920.

The previous prime is 218323013. The next prime is 218323019. The reversal of 218323017 is 710323812.

It is not a de Polignac number, because 218323017 - 2² = 218323013 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218323013) 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 11 ways as a sum of consecutive naturals, for example, 1102543 + ... + 1102740.

It is an arithmetic number, because the mean of its divisors is an integer number (28668692).

Almost surely, 2^218323017 is an apocalyptic number.

It is an amenable number.

218323017 is a deficient number, since it is larger than the sum of its proper divisors (125701287).

218323017 is a wasteful number, since it uses less digits than its factorization.

218323017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205300 (or 2205297 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 218323017 is about 14775.7577470666. The cubic root of 218323017 is about 602.1432764936.

Adding to 218323017 its reverse (710323812), we get a palindrome (928646829).

It can be divided in two parts, 2183 and 23017, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 218323017 in words is "two hundred eighteen million, three hundred twenty-three thousand, seventeen".