2185975089 has 24 divisors (see below), whose sum is σ = 3221211240. Its totient is φ = 1427991552.

The previous prime is 2185975081. The next prime is 2185975097. The reversal of 2185975089 is 9805795812.

It is an interprime number because it is at equal distance from previous prime (2185975081) and next prime (2185975097).

It can be written as a sum of positive squares in 4 ways, for example, as 16744464 + 2169230625 = 4092^2 + 46575^2 .

It is not a de Polignac number, because 2185975089 - 2³ = 2185975081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2185975081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440667 + ... + 445599.

It is an arithmetic number, because the mean of its divisors is an integer number (134217135).

Almost surely, 2^2185975089 is an apocalyptic number.

It is an amenable number.

2185975089 is a deficient number, since it is larger than the sum of its proper divisors (1035236151).

2185975089 is a wasteful number, since it uses less digits than its factorization.

2185975089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921 (or 5918 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 2185975089 is about 46754.4125083398. The cubic root of 2185975089 is about 1297.8218137678.

The spelling of 2185975089 in words is "two billion, one hundred eighty-five million, nine hundred seventy-five thousand, eighty-nine".