218112807 has 16 divisors (see below), whose sum is σ = 327490560. Its totient is φ = 127924800.

The previous prime is 218112787. The next prime is 218112809. The reversal of 218112807 is 708211812.

It is a happy number.

It is not a de Polignac number, because 218112807 - 2¹¹ = 218110759 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 105582 + ... + 107627.

It is an arithmetic number, because the mean of its divisors is an integer number (20468160).

Almost surely, 2^218112807 is an apocalyptic number.

218112807 is a deficient number, since it is larger than the sum of its proper divisors (109377753).

218112807 is a wasteful number, since it uses less digits than its factorization.

218112807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213254.

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 218112807 is about 14768.6426932200. The cubic root of 218112807 is about 601.9499586812.

The spelling of 218112807 in words is "two hundred eighteen million, one hundred twelve thousand, eight hundred seven".