3130020281 has 2 divisors, whose sum is σ = 3130020282. Its totient is φ = 3130020280.

The previous prime is 3130020193. The next prime is 3130020301. The reversal of 3130020281 is 1820200313.

It is an a-pointer prime, because the next prime (3130020301) can be obtained adding 3130020281 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2089312681 + 1040707600 = 45709^2 + 32260^2 .

It is an emirp because it is prime and its reverse (1820200313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3130020281 - 2¹⁴ = 3130003897 is a prime.

It is a super-2 number, since 2×3130020281² = 19594053918942637922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3130022281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565010140 + 1565010141.

It is an arithmetic number, because the mean of its divisors is an integer number (1565010141).

Almost surely, 2^3130020281 is an apocalyptic number.

It is an amenable number.

3130020281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3130020281 is an equidigital number, since it uses as much as digits as its factorization.

3130020281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3130020281 is about 55946.5841763373. The cubic root of 3130020281 is about 1462.7913510765.

Adding to 3130020281 its reverse (1820200313), we get a palindrome (4950220594).

The spelling of 3130020281 in words is "three billion, one hundred thirty million, twenty thousand, two hundred eighty-one".