2165095191 has 8 divisors (see below), whose sum is σ = 3299192704. Its totient is φ = 1237197240.

The previous prime is 2165095183. The next prime is 2165095199. The reversal of 2165095191 is 1915905612.

It is an interprime number because it is at equal distance from previous prime (2165095183) and next prime (2165095199).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2165095191 - 2³ = 2165095183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165095199) 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, 51549865 + ... + 51549906.

It is an arithmetic number, because the mean of its divisors is an integer number (412399088).

Almost surely, 2^2165095191 is an apocalyptic number.

2165095191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2165095191 is a deficient number, since it is larger than the sum of its proper divisors (1134097513).

2165095191 is a wasteful number, since it uses less digits than its factorization.

2165095191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103099781.

The product of its (nonzero) digits is 24300, while the sum is 39.

The square root of 2165095191 is about 46530.5833941506. The cubic root of 2165095191 is about 1293.6764284798.

The spelling of 2165095191 in words is "two billion, one hundred sixty-five million, ninety-five thousand, one hundred ninety-one".