2185220185 has 16 divisors (see below), whose sum is σ = 2727244800. Its totient is φ = 1679386176.

The previous prime is 2185220183. The next prime is 2185220203. The reversal of 2185220185 is 5810225812.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2185220185 - 2¹ = 2185220183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2185220185.

It is not an unprimeable number, because it can be changed into a prime (2185220183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60145 + ... + 89374.

It is an arithmetic number, because the mean of its divisors is an integer number (170452800).

Almost surely, 2^2185220185 is an apocalyptic number.

It is an amenable number.

2185220185 is a deficient number, since it is larger than the sum of its proper divisors (542024615).

2185220185 is a wasteful number, since it uses less digits than its factorization.

2185220185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149640.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 2185220185 is about 46746.3387336377. The cubic root of 2185220185 is about 1297.6724000981.

Adding to 2185220185 its reverse (5810225812), we get a palindrome (7995445997).

The spelling of 2185220185 in words is "two billion, one hundred eighty-five million, two hundred twenty thousand, one hundred eighty-five".