2081050681 has 4 divisors (see below), whose sum is σ = 2137295332. Its totient is φ = 2024806032.

The previous prime is 2081050679. The next prime is 2081050693. The reversal of 2081050681 is 1860501802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1860501802 = 2 ⋅930250901.

It can be written as a sum of positive squares in 2 ways, for example, as 1715285056 + 365765625 = 41416^2 + 19125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081050681 - 2¹ = 2081050679 is a prime.

It is a super-2 number, since 2×2081050681² = 8661543873781127522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081050381) 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 3 ways as a sum of consecutive naturals, for example, 28122270 + ... + 28122343.

It is an arithmetic number, because the mean of its divisors is an integer number (534323833).

Almost surely, 2^2081050681 is an apocalyptic number.

It is an amenable number.

2081050681 is a deficient number, since it is larger than the sum of its proper divisors (56244651).

2081050681 is an equidigital number, since it uses as much as digits as its factorization.

2081050681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56244650.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 2081050681 is about 45618.5344021484. The cubic root of 2081050681 is about 1276.7157587199.

The spelling of 2081050681 in words is "two billion, eighty-one million, fifty thousand, six hundred eighty-one".