315313321253321 has 2 divisors, whose sum is σ = 315313321253322. Its totient is φ = 315313321253320.

The previous prime is 315313321253303. The next prime is 315313321253347. The reversal of 315313321253321 is 123352123313513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185222872534921 + 130090448718400 = 13609661^2 + 11405720^2 .

It is a cyclic number.

It is not a de Polignac number, because 315313321253321 - 2¹⁰ = 315313321252297 is a prime.

It is not a weakly prime, because it can be changed into another prime (315313321223321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157656660626660 + 157656660626661.

It is an arithmetic number, because the mean of its divisors is an integer number (157656660626661).

Almost surely, 2^{315313321253321} is an apocalyptic number.

It is an amenable number.

315313321253321 is a deficient number, since it is larger than the sum of its proper divisors (1).

315313321253321 is an equidigital number, since it uses as much as digits as its factorization.

315313321253321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 38.

Adding to 315313321253321 its reverse (123352123313513), we get a palindrome (438665444566834).

The spelling of 315313321253321 in words is "three hundred fifteen trillion, three hundred thirteen billion, three hundred twenty-one million, two hundred fifty-three thousand, three hundred twenty-one".