313020321 has 4 divisors (see below), whose sum is σ = 417360432. Its totient is φ = 208680212.

The previous prime is 313020319. The next prime is 313020347. The reversal of 313020321 is 123020313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313020321 - 2¹ = 313020319 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 313020321.

It is not an unprimeable number, because it can be changed into a prime (313070321) 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 in 3 ways as a sum of consecutive naturals, for example, 52170051 + ... + 52170056.

It is an arithmetic number, because the mean of its divisors is an integer number (104340108).

Almost surely, 2^313020321 is an apocalyptic number.

It is an amenable number.

313020321 is a deficient number, since it is larger than the sum of its proper divisors (104340111).

313020321 is a wasteful number, since it uses less digits than its factorization.

313020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104340110.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 313020321 is about 17692.3803090483. The cubic root of 313020321 is about 678.9808269049.

Adding to 313020321 its reverse (123020313), we get a palindrome (436040634).

The spelling of 313020321 in words is "three hundred thirteen million, twenty thousand, three hundred twenty-one".