218868867 has 12 divisors (see below), whose sum is σ = 361307440. Its totient is φ = 125067888.

The previous prime is 218868827. The next prime is 218868869. The reversal of 218868867 is 768868812.

It is not a de Polignac number, because 218868867 - 2¹¹ = 218866819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218868869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1736992 + ... + 1737117.

Almost surely, 2^218868867 is an apocalyptic number.

218868867 is a deficient number, since it is larger than the sum of its proper divisors (142438573).

218868867 is a wasteful number, since it uses less digits than its factorization.

218868867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474122 (or 3474119 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 218868867 is about 14794.2173500324. The cubic root of 218868867 is about 602.6446839504.

Subtracting 218868867 from its reverse (768868812), we obtain a palindrome (549999945).

The spelling of 218868867 in words is "two hundred eighteen million, eight hundred sixty-eight thousand, eight hundred sixty-seven".