313312321 has 8 divisors (see below), whose sum is σ = 365379200. Its totient is φ = 268553124.

The previous prime is 313312303. The next prime is 313312327. The reversal of 313312321 is 123213313.

It is a de Polignac number, because none of the positive numbers 2^k-313312321 is a prime.

It is a super-2 number, since 2×313312321² = 196329220980814082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313312327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456381 + ... + 457066.

It is an arithmetic number, because the mean of its divisors is an integer number (45672400).

Almost surely, 2^313312321 is an apocalyptic number.

It is an amenable number.

313312321 is a deficient number, since it is larger than the sum of its proper divisors (52066879).

313312321 is an frugal number, since it uses more digits than its factorization.

313312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913468 (or 913454 counting only the distinct ones).

The product of its digits is 324, while the sum is 19.

The square root of 313312321 is about 17700.6305254926. The cubic root of 313312321 is about 679.1918896492.

Adding to 313312321 its reverse (123213313), we get a palindrome (436525634).

The spelling of 313312321 in words is "three hundred thirteen million, three hundred twelve thousand, three hundred twenty-one".