2218520218872 has 32 divisors (see below), whose sum is σ = 5640305644800. Its totient is φ = 726972726624.

The previous prime is 2218520218843. The next prime is 2218520218877. The reversal of 2218520218872 is 2788120258122.

It is a super-3 number, since 3×2218520218872³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218520218877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783374368 + ... + 783377199.

It is an arithmetic number, because the mean of its divisors is an integer number (176259551400).

Almost surely, 2^{2218520218872} is an apocalyptic number.

It is an amenable number.

2218520218872 is an abundant number, since it is smaller than the sum of its proper divisors (3421785425928).

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

2218520218872 is a wasteful number, since it uses less digits than its factorization.

2218520218872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566751635 (or 1566751631 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 2218520218872 in words is "two trillion, two hundred eighteen billion, five hundred twenty million, two hundred eighteen thousand, eight hundred seventy-two".