2165006305 has 16 divisors (see below), whose sum is σ = 3239074944. Its totient is φ = 1349614080.

The previous prime is 2165006299. The next prime is 2165006329. The reversal of 2165006305 is 5036005612.

It is not a de Polignac number, because 2165006305 - 2¹⁵ = 2164973537 is a prime.

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, 2811312 + ... + 2812081.

It is an arithmetic number, because the mean of its divisors is an integer number (202442184).

Almost surely, 2^2165006305 is an apocalyptic number.

It is an amenable number.

2165006305 is a deficient number, since it is larger than the sum of its proper divisors (1074068639).

2165006305 is a wasteful number, since it uses less digits than its factorization.

2165006305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623416.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2165006305 is about 46529.6282491060. The cubic root of 2165006305 is about 1293.6587246706.

The spelling of 2165006305 in words is "two billion, one hundred sixty-five million, six thousand, three hundred five".