3101816681 has 2 divisors, whose sum is σ = 3101816682. Its totient is φ = 3101816680.

The previous prime is 3101816659. The next prime is 3101816699. The reversal of 3101816681 is 1866181013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2339173225 + 762643456 = 48365^2 + 27616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3101816681 is a prime.

It is a super-2 number, since 2×3101816681² = 19242533445059711522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3101816981) 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 as a sum of consecutive naturals, namely, 1550908340 + 1550908341.

It is an arithmetic number, because the mean of its divisors is an integer number (1550908341).

Almost surely, 2^3101816681 is an apocalyptic number.

It is an amenable number.

3101816681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3101816681 is an equidigital number, since it uses as much as digits as its factorization.

3101816681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 3101816681 is about 55693.9555158367. The cubic root of 3101816681 is about 1458.3845083872.

Adding to 3101816681 its reverse (1866181013), we get a palindrome (4967997694).

The spelling of 3101816681 in words is "three billion, one hundred one million, eight hundred sixteen thousand, six hundred eighty-one".