313430321 has 4 divisors (see below), whose sum is σ = 316952100. Its totient is φ = 309908544.

The previous prime is 313430317. The next prime is 313430323. The reversal of 313430321 is 123034313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123034313 = 173 ⋅711181.

It can be written as a sum of positive squares in 2 ways, for example, as 105349696 + 208080625 = 10264^2 + 14425^2 .

It is a cyclic number.

It is not a de Polignac number, because 313430321 - 2² = 313430317 is a prime.

It is a super-2 number, since 2×313430321² = 196477132244326082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313430293 and 313430302.

It is not an unprimeable number, because it can be changed into a prime (313430323) 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, 1760756 + ... + 1760933.

It is an arithmetic number, because the mean of its divisors is an integer number (79238025).

Almost surely, 2^313430321 is an apocalyptic number.

It is an amenable number.

313430321 is a deficient number, since it is larger than the sum of its proper divisors (3521779).

313430321 is an equidigital number, since it uses as much as digits as its factorization.

313430321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521778.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 313430321 is about 17703.9634263066. The cubic root of 313430321 is about 679.2771449236.

Adding to 313430321 its reverse (123034313), we get a palindrome (436464634).

The spelling of 313430321 in words is "three hundred thirteen million, four hundred thirty thousand, three hundred twenty-one".