218112140 has 12 divisors (see below), whose sum is σ = 458035536. Its totient is φ = 87244848.

The previous prime is 218112107. The next prime is 218112173. The reversal of 218112140 is 41211812.

218112140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (218112107) and next prime (218112173).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10905607 = 218112140 / (2 + 1 + 8 + 1 + 1 + 2 + 1 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5452784 + ... + 5452823.

It is an arithmetic number, because the mean of its divisors is an integer number (38169628).

Almost surely, 2^218112140 is an apocalyptic number.

218112140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218112140 is an abundant number, since it is smaller than the sum of its proper divisors (239923396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218112140 is a wasteful number, since it uses less digits than its factorization.

218112140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10905616 (or 10905614 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 218112140 is about 14768.6201115744. The cubic root of 218112140 is about 601.9493450827.

Adding to 218112140 its reverse (41211812), we get a palindrome (259323952).

The spelling of 218112140 in words is "two hundred eighteen million, one hundred twelve thousand, one hundred forty".