2125811085 has 8 divisors (see below), whose sum is σ = 3401297760. Its totient is φ = 1133765904.

The previous prime is 2125811063. The next prime is 2125811089. The reversal of 2125811085 is 5801185212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2125811085 - 2⁸ = 2125810829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125811089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70860355 + ... + 70860384.

It is an arithmetic number, because the mean of its divisors is an integer number (425162220).

Almost surely, 2^2125811085 is an apocalyptic number.

It is an amenable number.

2125811085 is a deficient number, since it is larger than the sum of its proper divisors (1275486675).

2125811085 is a wasteful number, since it uses less digits than its factorization.

2125811085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141720747.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 2125811085 is about 46106.5188991752. The cubic root of 2125811085 is about 1285.8043453405.

Adding to 2125811085 its reverse (5801185212), we get a palindrome (7926996297).

The spelling of 2125811085 in words is "two billion, one hundred twenty-five million, eight hundred eleven thousand, eighty-five".