10311721513 has 2 divisors, whose sum is σ = 10311721514. Its totient is φ = 10311721512.

The previous prime is 10311721481. The next prime is 10311721573. The reversal of 10311721513 is 31512711301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10287436329 + 24285184 = 101427^2 + 4928^2 .

It is a cyclic number.

It is not a de Polignac number, because 10311721513 - 2⁵ = 10311721481 is a prime.

It is not a weakly prime, because it can be changed into another prime (10311721573) 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, 5155860756 + 5155860757.

It is an arithmetic number, because the mean of its divisors is an integer number (5155860757).

Almost surely, 2^10311721513 is an apocalyptic number.

It is an amenable number.

10311721513 is a deficient number, since it is larger than the sum of its proper divisors (1).

10311721513 is an equidigital number, since it uses as much as digits as its factorization.

10311721513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The spelling of 10311721513 in words is "ten billion, three hundred eleven million, seven hundred twenty-one thousand, five hundred thirteen".