214445218 has 16 divisors (see below), whose sum is σ = 347933880. Its totient is φ = 98539776.

The previous prime is 214445213. The next prime is 214445219. The reversal of 214445218 is 812544412.

It can be written as a sum of positive squares in 4 ways, for example, as 193404649 + 21040569 = 13907^2 + 4587^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 214445218.

It is not an unprimeable number, because it can be changed into a prime (214445213) 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, 12055 + ... + 23962.

Almost surely, 2^214445218 is an apocalyptic number.

214445218 is a deficient number, since it is larger than the sum of its proper divisors (133488662).

214445218 is a wasteful number, since it uses less digits than its factorization.

214445218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36261.

The product of its digits is 10240, while the sum is 31.

The square root of 214445218 is about 14643.9481698072. The cubic root of 214445218 is about 598.5569190151.

It can be divided in two parts, 21444 and 5218, that added together give a palindrome (26662).

The spelling of 214445218 in words is "two hundred fourteen million, four hundred forty-five thousand, two hundred eighteen".