2185211188 has 12 divisors (see below), whose sum is σ = 3825041220. Its totient is φ = 1092342272.

The previous prime is 2185211183. The next prime is 2185211191. The reversal of 2185211188 is 8811125812.

2185211188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1368852004 + 816359184 = 36998^2 + 28572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185211183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46531 + ... + 80842.

It is an arithmetic number, because the mean of its divisors is an integer number (318753435).

Almost surely, 2^2185211188 is an apocalyptic number.

It is an amenable number.

2185211188 is a deficient number, since it is larger than the sum of its proper divisors (1639830032).

2185211188 is a wasteful number, since it uses less digits than its factorization.

2185211188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131666 (or 131664 counting only the distinct ones).

The product of its digits is 10240, while the sum is 37.

The square root of 2185211188 is about 46746.2425014033. The cubic root of 2185211188 is about 1297.6706191678.

The spelling of 2185211188 in words is "two billion, one hundred eighty-five million, two hundred eleven thousand, one hundred eighty-eight".