218385122 has 16 divisors (see below), whose sum is σ = 336327552. Its totient is φ = 106307760.

The previous prime is 218385119. The next prime is 218385169. The reversal of 218385122 is 221583812.

It is a happy number.

218385122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 6023 + ... + 21749.

It is an arithmetic number, because the mean of its divisors is an integer number (21020472).

Almost surely, 2^218385122 is an apocalyptic number.

218385122 is a deficient number, since it is larger than the sum of its proper divisors (117942430).

218385122 is a wasteful number, since it uses less digits than its factorization.

218385122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913.

The product of its digits is 7680, while the sum is 32.

The square root of 218385122 is about 14777.8591818978. The cubic root of 218385122 is about 602.2003670733.

The spelling of 218385122 in words is "two hundred eighteen million, three hundred eighty-five thousand, one hundred twenty-two".