3130447681 has 2 divisors, whose sum is σ = 3130447682. Its totient is φ = 3130447680.

The previous prime is 3130447679. The next prime is 3130447693. The reversal of 3130447681 is 1867440313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3089692225 + 40755456 = 55585^2 + 6384^2 .

It is an emirp because it is prime and its reverse (1867440313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3130447681 - 2¹ = 3130447679 is a prime.

It is a super-2 number, since 2×3130447681² = 19599405366956555522, which contains 22 as substring.

Together with 3130447679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3130447681.

It is not a weakly prime, because it can be changed into another prime (3130447781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565223840 + 1565223841.

It is an arithmetic number, because the mean of its divisors is an integer number (1565223841).

Almost surely, 2^3130447681 is an apocalyptic number.

It is an amenable number.

3130447681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3130447681 is an equidigital number, since it uses as much as digits as its factorization.

3130447681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 3130447681 is about 55950.4037608309. The cubic root of 3130447681 is about 1462.8579287675.

Adding to 3130447681 its reverse (1867440313), we get a palindrome (4997887994).

The spelling of 3130447681 in words is "three billion, one hundred thirty million, four hundred forty-seven thousand, six hundred eighty-one".