218418316 has 24 divisors (see below), whose sum is σ = 393089760. Its totient is φ = 106128000.

The previous prime is 218418313. The next prime is 218418337. The reversal of 218418316 is 613814812.

It is not an unprimeable number, because it can be changed into a prime (218418313) 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, 41641 + ... + 46591.

It is an arithmetic number, because the mean of its divisors is an integer number (16378740).

Almost surely, 2^218418316 is an apocalyptic number.

It is an amenable number.

218418316 is a deficient number, since it is larger than the sum of its proper divisors (174671444).

218418316 is a wasteful number, since it uses less digits than its factorization.

218418316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265 (or 5263 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 218418316 is about 14778.9822383004. The cubic root of 218418316 is about 602.2308765179.

The spelling of 218418316 in words is "two hundred eighteen million, four hundred eighteen thousand, three hundred sixteen".