218914312 has 16 divisors (see below), whose sum is σ = 423705600. Its totient is φ = 105926160.

The previous prime is 218914309. The next prime is 218914337. The reversal of 218914312 is 213419812.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 441112 + ... + 441607.

It is an arithmetic number, because the mean of its divisors is an integer number (26481600).

Almost surely, 2^218914312 is an apocalyptic number.

It is an amenable number.

218914312 is a deficient number, since it is larger than the sum of its proper divisors (204791288).

218914312 is a wasteful number, since it uses less digits than its factorization.

218914312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882756 (or 882752 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 218914312 is about 14795.7531744754. The cubic root of 218914312 is about 602.6863912563.

The spelling of 218914312 in words is "two hundred eighteen million, nine hundred fourteen thousand, three hundred twelve".