2165308245 has 24 divisors (see below), whose sum is σ = 3754304736. Its totient is φ = 1154491488.

The previous prime is 2165308219. The next prime is 2165308253. The reversal of 2165308245 is 5428035612.

2165308245 is a `hidden beast` number, since 2 + 1 + 6 + 530 + 82 + 45 = 666.

It is not a de Polignac number, because 2165308245 - 2¹⁴ = 2165291861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251502 + ... + 259968.

It is an arithmetic number, because the mean of its divisors is an integer number (156429364).

Almost surely, 2^2165308245 is an apocalyptic number.

It is an amenable number.

2165308245 is a deficient number, since it is larger than the sum of its proper divisors (1588996491).

2165308245 is a wasteful number, since it uses less digits than its factorization.

2165308245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14161 (or 14158 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 2165308245 is about 46532.8727353040. The cubic root of 2165308245 is about 1293.7188613944.

The spelling of 2165308245 in words is "two billion, one hundred sixty-five million, three hundred eight thousand, two hundred forty-five".