321303313 has 4 divisors (see below), whose sum is σ = 331667968. Its totient is φ = 310938660.

The previous prime is 321303299. The next prime is 321303341. The reversal of 321303313 is 313303123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313303123 = 7 ⋅44757589.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321303313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321363313) 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, 5182281 + ... + 5182342.

It is an arithmetic number, because the mean of its divisors is an integer number (82916992).

Almost surely, 2^321303313 is an apocalyptic number.

It is an amenable number.

321303313 is a deficient number, since it is larger than the sum of its proper divisors (10364655).

321303313 is a wasteful number, since it uses less digits than its factorization.

321303313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364654.

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

The square root of 321303313 is about 17924.9355089495. The cubic root of 321303313 is about 684.9177182856.

Adding to 321303313 its reverse (313303123), we get a palindrome (634606436).

The spelling of 321303313 in words is "three hundred twenty-one million, three hundred three thousand, three hundred thirteen".