2181085895 has 16 divisors (see below), whose sum is σ = 2642777280. Its totient is φ = 1727948544.

The previous prime is 2181085871. The next prime is 2181085903. The reversal of 2181085895 is 5985801812.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2181085895 - 2⁶ = 2181085831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297089 + ... + 304341.

It is an arithmetic number, because the mean of its divisors is an integer number (165173580).

Almost surely, 2^2181085895 is an apocalyptic number.

2181085895 is a deficient number, since it is larger than the sum of its proper divisors (461691385).

2181085895 is a wasteful number, since it uses less digits than its factorization.

2181085895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7834.

The product of its (nonzero) digits is 230400, while the sum is 47.

The square root of 2181085895 is about 46702.0973297774. The cubic root of 2181085895 is about 1296.8535137448.

The spelling of 2181085895 in words is "two billion, one hundred eighty-one million, eighty-five thousand, eight hundred ninety-five".