3131130209 has 2 divisors, whose sum is σ = 3131130210. Its totient is φ = 3131130208.

The previous prime is 3131130199. The next prime is 3131130239. The reversal of 3131130209 is 9020311313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2497500625 + 633629584 = 49975^2 + 25172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131130209 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131130239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565565104 + 1565565105.

It is an arithmetic number, because the mean of its divisors is an integer number (1565565105).

Almost surely, 2^3131130209 is an apocalyptic number.

It is an amenable number.

3131130209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131130209 is an equidigital number, since it uses as much as digits as its factorization.

3131130209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 3131130209 is about 55956.5028303235. The cubic root of 3131130209 is about 1462.9642361335.

The spelling of 3131130209 in words is "three billion, one hundred thirty-one million, one hundred thirty thousand, two hundred nine".