2140528081 has 2 divisors, whose sum is σ = 2140528082. Its totient is φ = 2140528080.

The previous prime is 2140528073. The next prime is 2140528099. The reversal of 2140528081 is 1808250412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1998537025 + 141991056 = 44705^2 + 11916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140528081 - 2³ = 2140528073 is a prime.

It is a super-2 number, since 2×2140528081² = 9163720931099085122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2140528381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070264040 + 1070264041.

It is an arithmetic number, because the mean of its divisors is an integer number (1070264041).

Almost surely, 2^2140528081 is an apocalyptic number.

It is an amenable number.

2140528081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140528081 is an equidigital number, since it uses as much as digits as its factorization.

2140528081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 2140528081 is about 46265.8414059444. The cubic root of 2140528081 is about 1288.7647332319.

Adding to 2140528081 its reverse (1808250412), we get a palindrome (3948778493).

The spelling of 2140528081 in words is "two billion, one hundred forty million, five hundred twenty-eight thousand, eighty-one".