313330321 has 4 divisors (see below), whose sum is σ = 313370932. Its totient is φ = 313289712.

The previous prime is 313330309. The next prime is 313330337. The reversal of 313330321 is 123033313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 242113600 + 71216721 = 15560^2 + 8439^2 .

It is a cyclic number.

It is not a de Polignac number, because 313330321 - 2¹⁵ = 313297553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313330301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4770 + ... + 25483.

It is an arithmetic number, because the mean of its divisors is an integer number (78342733).

Almost surely, 2^313330321 is an apocalyptic number.

It is an amenable number.

313330321 is a deficient number, since it is larger than the sum of its proper divisors (40611).

313330321 is a wasteful number, since it uses less digits than its factorization.

313330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40610.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 313330321 is about 17701.1389746536. The cubic root of 313330321 is about 679.2048960745.

Adding to 313330321 its reverse (123033313), we get a palindrome (436363634).

The spelling of 313330321 in words is "three hundred thirteen million, three hundred thirty thousand, three hundred twenty-one".