2165155008 has 56 divisors (see below), whose sum is σ = 5735135088. Its totient is φ = 720900096.

The previous prime is 2165155001. The next prime is 2165155021. The reversal of 2165155008 is 8005515612.

It is a self number, because there is not a number n which added to its sum of digits gives 2165155008.

It is not an unprimeable number, because it can be changed into a prime (2165155001) 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, 177060 + ... + 188892.

Almost surely, 2^2165155008 is an apocalyptic number.

It is an amenable number.

2165155008 is an abundant number, since it is smaller than the sum of its proper divisors (3569980080).

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

2165155008 is a wasteful number, since it uses less digits than its factorization.

2165155008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12801 (or 12791 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 2165155008 is about 46531.2261605043. The cubic root of 2165155008 is about 1293.6883422178.

The spelling of 2165155008 in words is "two billion, one hundred sixty-five million, one hundred fifty-five thousand, eight".