2218520218871 has 8 divisors (see below), whose sum is σ = 2429200918800. Its totient is φ = 2009339026240.

The previous prime is 2218520218843. The next prime is 2218520218877. The reversal of 2218520218871 is 1788120258122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2218520218871 - 2²⁶ = 2218453110007 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374873726 + ... + 374879643.

It is an arithmetic number, because the mean of its divisors is an integer number (303650114850).

Almost surely, 2^{2218520218871} is an apocalyptic number.

2218520218871 is a deficient number, since it is larger than the sum of its proper divisors (210680699929).

2218520218871 is a wasteful number, since it uses less digits than its factorization.

2218520218871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749753649.

The product of its (nonzero) digits is 286720, while the sum is 47.

The spelling of 2218520218871 in words is "two trillion, two hundred eighteen billion, five hundred twenty million, two hundred eighteen thousand, eight hundred seventy-one".