2128530585 has 16 divisors (see below), whose sum is σ = 3425338944. Its totient is φ = 1128652992.

The previous prime is 2128530581. The next prime is 2128530617. The reversal of 2128530585 is 5850358212.

It is not a de Polignac number, because 2128530585 - 2² = 2128530581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2128530581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407527 + ... + 412716.

It is an arithmetic number, because the mean of its divisors is an integer number (214083684).

Almost surely, 2^2128530585 is an apocalyptic number.

It is an amenable number.

2128530585 is a deficient number, since it is larger than the sum of its proper divisors (1296808359).

2128530585 is a wasteful number, since it uses less digits than its factorization.

2128530585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820424.

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 2128530585 is about 46136.0009645396. Note that the first 3 decimals coincide. The cubic root of 2128530585 is about 1286.3524114253.

Adding to 2128530585 its reverse (5850358212), we get a palindrome (7978888797).

The spelling of 2128530585 in words is "two billion, one hundred twenty-eight million, five hundred thirty thousand, five hundred eighty-five".