2130568681 has 2 divisors, whose sum is σ = 2130568682. Its totient is φ = 2130568680.

The previous prime is 2130568579. The next prime is 2130568697. The reversal of 2130568681 is 1868650312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485408681 + 645160000 = 38541^2 + 25400^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130568681 - 2¹³ = 2130560489 is a prime.

It is a super-2 number, since 2×2130568681² = 9078645808916159522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2130568481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065284340 + 1065284341.

It is an arithmetic number, because the mean of its divisors is an integer number (1065284341).

Almost surely, 2^2130568681 is an apocalyptic number.

It is an amenable number.

2130568681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130568681 is an equidigital number, since it uses as much as digits as its factorization.

2130568681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 2130568681 is about 46158.0835932342. The cubic root of 2130568681 is about 1286.7628468988.

The spelling of 2130568681 in words is "two billion, one hundred thirty million, five hundred sixty-eight thousand, six hundred eighty-one".