2185128110 has 48 divisors (see below), whose sum is σ = 4511330208. Its totient is φ = 760034880.

The previous prime is 2185128109. The next prime is 2185128223. The reversal of 2185128110 is 118215812.

It is a super-2 number, since 2×2185128110² = 9549569714224344200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11429 + ... + 67088.

It is an arithmetic number, because the mean of its divisors is an integer number (93986046).

Almost surely, 2^2185128110 is an apocalyptic number.

2185128110 is an abundant number, since it is smaller than the sum of its proper divisors (2326202098).

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

2185128110 is a wasteful number, since it uses less digits than its factorization.

2185128110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78569 (or 78558 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 29.

The square root of 2185128110 is about 46745.3538867768. The cubic root of 2185128110 is about 1297.6541738853.

It can be divided in two parts, 218512 and 8110, that added together give a palindrome (226622).

The spelling of 2185128110 in words is "two billion, one hundred eighty-five million, one hundred twenty-eight thousand, one hundred ten".