2165320089 has 9 divisors (see below), whose sum is σ = 3127886229. Its totient is φ = 1443453660.

The previous prime is 2165320063. The next prime is 2165320093. The reversal of 2165320089 is 9800235612.

The square root of 2165320089 is 46533.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2165320089 - 2⁵ = 2165320057 is a prime.

It is a super-3 number, since 3×2165320089³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2165320049) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 131844 + ... + 147354.

Almost surely, 2^2165320089 is an apocalyptic number.

2165320089 is the 46533-rd square number.

2165320089 is the 23267-th centered octagonal number.

It is an amenable number.

2165320089 is a deficient number, since it is larger than the sum of its proper divisors (962566140).

2165320089 is an frugal number, since it uses more digits than its factorization.

2165320089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31028 (or 15514 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 2165320089 is about 1293.7212202238.

Multiplying 2165320089 by its sum of digits (36), we get a square (77951523204 = 279198²).

The spelling of 2165320089 in words is "two billion, one hundred sixty-five million, three hundred twenty thousand, eighty-nine".