2165055705 has 48 divisors (see below), whose sum is σ = 3866952960. Its totient is φ = 1120003584.

The previous prime is 2165055701. The next prime is 2165055749. The reversal of 2165055705 is 5075505612.

It is a happy number.

2165055705 is a `hidden beast` number, since 21 + 65 + 0 + 5 + 570 + 5 = 666.

It is not a de Polignac number, because 2165055705 - 2² = 2165055701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2165055705.

It is not an unprimeable number, because it can be changed into a prime (2165055701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 234466 + ... + 243524.

It is an arithmetic number, because the mean of its divisors is an integer number (80561520).

Almost surely, 2^2165055705 is an apocalyptic number.

It is an amenable number.

2165055705 is a deficient number, since it is larger than the sum of its proper divisors (1701897255).

2165055705 is a wasteful number, since it uses less digits than its factorization.

2165055705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9230 (or 9227 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 2165055705 is about 46530.1590906371. The cubic root of 2165055705 is about 1293.6685639422.

The spelling of 2165055705 in words is "two billion, one hundred sixty-five million, fifty-five thousand, seven hundred five".