2165248799 has 12 divisors (see below), whose sum is σ = 2543218704. Its totient is φ = 1837904544.

The previous prime is 2165248793. The next prime is 2165248801. The reversal of 2165248799 is 9978425612.

It is not a de Polignac number, because 2165248799 - 2²⁰ = 2164200223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2165248799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165248793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209462 + ... + 219555.

It is an arithmetic number, because the mean of its divisors is an integer number (211934892).

Almost surely, 2^2165248799 is an apocalyptic number.

2165248799 is a deficient number, since it is larger than the sum of its proper divisors (377969905).

2165248799 is a wasteful number, since it uses less digits than its factorization.

2165248799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429134 (or 429127 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The square root of 2165248799 is about 46532.2339781790. The cubic root of 2165248799 is about 1293.7070221077.

The spelling of 2165248799 in words is "two billion, one hundred sixty-five million, two hundred forty-eight thousand, seven hundred ninety-nine".