2165330056 has 8 divisors (see below), whose sum is σ = 4059993870. Its totient is φ = 1082665024.

The previous prime is 2165330051. The next prime is 2165330077. The reversal of 2165330056 is 6500335612.

It can be written as a sum of positive squares in only one way, i.e., 1149888100 + 1015441956 = 33910^2 + 31866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2165330051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135333121 + ... + 135333136.

Almost surely, 2^2165330056 is an apocalyptic number.

It is an amenable number.

2165330056 is a deficient number, since it is larger than the sum of its proper divisors (1894663814).

2165330056 is a wasteful number, since it uses less digits than its factorization.

2165330056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270666263 (or 270666259 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 2165330056 is about 46533.1070959161. The cubic root of 2165330056 is about 1293.7232052266.

Adding to 2165330056 its reverse (6500335612), we get a palindrome (8665665668).

The spelling of 2165330056 in words is "two billion, one hundred sixty-five million, three hundred thirty thousand, fifty-six".