218204842 has 16 divisors (see below), whose sum is σ = 332633952. Its totient is φ = 107338000.

The previous prime is 218204839. The next prime is 218204851. The reversal of 218204842 is 248402812.

It is a super-2 number, since 2×218204842² = 95226706144489928, which contains 22 as substring.

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, 39048 + ... + 44284.

It is an arithmetic number, because the mean of its divisors is an integer number (20789622).

Almost surely, 2^218204842 is an apocalyptic number.

218204842 is a deficient number, since it is larger than the sum of its proper divisors (114429110).

218204842 is a wasteful number, since it uses less digits than its factorization.

218204842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 218204842 is about 14771.7582568901. The cubic root of 218204842 is about 602.0346131539.

It can be divided in two parts, 21820 and 4842, that added together give a palindrome (26662).

The spelling of 218204842 in words is "two hundred eighteen million, two hundred four thousand, eight hundred forty-two".