2165615216 has 20 divisors (see below), whose sum is σ = 4196742552. Its totient is φ = 1082584896.

The previous prime is 2165615201. The next prime is 2165615219. The reversal of 2165615216 is 6125165612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165615219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89651 + ... + 111213.

Almost surely, 2^2165615216 is an apocalyptic number.

It is an amenable number.

2165615216 is a deficient number, since it is larger than the sum of its proper divisors (2031127336).

2165615216 is a wasteful number, since it uses less digits than its factorization.

2165615216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27848 (or 27842 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 2165615216 is about 46536.1710500552. The cubic root of 2165615216 is about 1293.7799944006.

The spelling of 2165615216 in words is "two billion, one hundred sixty-five million, six hundred fifteen thousand, two hundred sixteen".