2165013905 has 8 divisors (see below), whose sum is σ = 2598984384. Its totient is φ = 1731366000.

The previous prime is 2165013887. The next prime is 2165013931. The reversal of 2165013905 is 5093105612.

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

It is a de Polignac number, because none of the positive numbers 2^k-2165013905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65621 + ... + 92930.

It is an arithmetic number, because the mean of its divisors is an integer number (324873048).

Almost surely, 2^2165013905 is an apocalyptic number.

It is an amenable number.

2165013905 is a deficient number, since it is larger than the sum of its proper divisors (433970479).

2165013905 is a wasteful number, since it uses less digits than its factorization.

2165013905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161287.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 2165013905 is about 46529.7099174280. The cubic root of 2165013905 is about 1293.6602384144.

The spelling of 2165013905 in words is "two billion, one hundred sixty-five million, thirteen thousand, nine hundred five".