15316651321 has 2 divisors, whose sum is σ = 15316651322. Its totient is φ = 15316651320.

The previous prime is 15316651289. The next prime is 15316651351. The reversal of 15316651321 is 12315661351.

15316651321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14456695696 + 859955625 = 120236^2 + 29325^2 .

It is a cyclic number.

It is not a de Polignac number, because 15316651321 - 2⁵ = 15316651289 is a prime.

It is not a weakly prime, because it can be changed into another prime (15316651351) 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, 7658325660 + 7658325661.

It is an arithmetic number, because the mean of its divisors is an integer number (7658325661).

Almost surely, 2^15316651321 is an apocalyptic number.

It is an amenable number.

15316651321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15316651321 is an equidigital number, since it uses as much as digits as its factorization.

15316651321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The spelling of 15316651321 in words is "fifteen billion, three hundred sixteen million, six hundred fifty-one thousand, three hundred twenty-one".