218112808 has 16 divisors (see below), whose sum is σ = 416678580. Its totient is φ = 106998528.

The previous prime is 218112787. The next prime is 218112809. The reversal of 218112808 is 808211812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 216619524 + 1493284 = 14718^2 + 1222^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218112808.

It is not an unprimeable number, because it can be changed into a prime (218112809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256785 + ... + 257632.

Almost surely, 2^218112808 is an apocalyptic number.

It is an amenable number.

218112808 is a deficient number, since it is larger than the sum of its proper divisors (198565772).

218112808 is a wasteful number, since it uses less digits than its factorization.

218112808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514476 (or 514472 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 218112808 is about 14768.6427270755. The cubic root of 218112808 is about 601.9499596011.

The spelling of 218112808 in words is "two hundred eighteen million, one hundred twelve thousand, eight hundred eight".