2165159120 has 20 divisors (see below), whose sum is σ = 5033995140. Its totient is φ = 866063616.

The previous prime is 2165159063. The next prime is 2165159149. The reversal of 2165159120 is 219515612.

It can be written as a sum of positive squares in 2 ways, for example, as 726625936 + 1438533184 = 26956^2 + 37928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13532165 + ... + 13532324.

It is an arithmetic number, because the mean of its divisors is an integer number (251699757).

Almost surely, 2^2165159120 is an apocalyptic number.

2165159120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165159120 is an abundant number, since it is smaller than the sum of its proper divisors (2868836020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165159120 is a wasteful number, since it uses less digits than its factorization.

2165159120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27064502 (or 27064496 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 2165159120 is about 46531.2703458653. The cubic root of 2165159120 is about 1293.6891611958.

The spelling of 2165159120 in words is "two billion, one hundred sixty-five million, one hundred fifty-nine thousand, one hundred twenty".