313220320321 has 4 divisors (see below), whose sum is σ = 313627629700. Its totient is φ = 312813010944.

The previous prime is 313220320319. The next prime is 313220320333. The reversal of 313220320321 is 123023022313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185899807921 + 127320512400 = 431161^2 + 356820^2 .

It is a cyclic number.

It is not a de Polignac number, because 313220320321 - 2¹ = 313220320319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313220320292 and 313220320301.

It is not an unprimeable number, because it can be changed into a prime (313220320381) 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 in 3 ways as a sum of consecutive naturals, for example, 203653536 + ... + 203655073.

It is an arithmetic number, because the mean of its divisors is an integer number (78406907425).

Almost surely, 2^313220320321 is an apocalyptic number.

It is an amenable number.

313220320321 is a deficient number, since it is larger than the sum of its proper divisors (407309379).

313220320321 is an equidigital number, since it uses as much as digits as its factorization.

313220320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407309378.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 313220320321 its reverse (123023022313), we get a palindrome (436243342634).

The spelling of 313220320321 in words is "three hundred thirteen billion, two hundred twenty million, three hundred twenty thousand, three hundred twenty-one".