218813881210 has 16 divisors (see below), whose sum is σ = 395555398056. Its totient is φ = 87149905408.

The previous prime is 218813881183. The next prime is 218813881213. The reversal of 218813881210 is 12188318812.

It can be written as a sum of positive squares in 4 ways, for example, as 125636929209 + 93176952001 = 354453^2 + 305249^2 .

It is a super-2 number, since 2×218813881210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218813881213) 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, 46953439 + ... + 46958098.

Almost surely, 2^218813881210 is an apocalyptic number.

218813881210 is a deficient number, since it is larger than the sum of its proper divisors (176741516846).

218813881210 is a wasteful number, since it uses less digits than its factorization.

218813881210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93911777.

The product of its (nonzero) digits is 49152, while the sum is 43.

The spelling of 218813881210 in words is "two hundred eighteen billion, eight hundred thirteen million, eight hundred eighty-one thousand, two hundred ten".