218040317 has 8 divisors (see below), whose sum is σ = 251854272. Its totient is φ = 186558400.

The previous prime is 218040313. The next prime is 218040323. The reversal of 218040317 is 713040812.

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 218040317 - 2² = 218040313 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 (218040313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582809 + ... + 583182.

It is an arithmetic number, because the mean of its divisors is an integer number (31481784).

Almost surely, 2^218040317 is an apocalyptic number.

It is an amenable number.

218040317 is a deficient number, since it is larger than the sum of its proper divisors (33813955).

218040317 is a wasteful number, since it uses less digits than its factorization.

218040317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166019.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 218040317 is about 14766.1883030117. The cubic root of 218040317 is about 601.8832650772.

The spelling of 218040317 in words is "two hundred eighteen million, forty thousand, three hundred seventeen".