313130321 has 4 divisors (see below), whose sum is σ = 357863232. Its totient is φ = 268397412.

The previous prime is 313130273. The next prime is 313130333. The reversal of 313130321 is 123031313.

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: 123031313 = 191 ⋅644143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313130321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313130321.

It is not an unprimeable number, because it can be changed into a prime (313130921) 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, 22366445 + ... + 22366458.

It is an arithmetic number, because the mean of its divisors is an integer number (89465808).

Almost surely, 2^313130321 is an apocalyptic number.

It is an amenable number.

313130321 is a deficient number, since it is larger than the sum of its proper divisors (44732911).

313130321 is an equidigital number, since it uses as much as digits as its factorization.

313130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44732910.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 313130321 is about 17695.4887188797. The cubic root of 313130321 is about 679.0603522465.

Adding to 313130321 its reverse (123031313), we get a palindrome (436161634).

The spelling of 313130321 in words is "three hundred thirteen million, one hundred thirty thousand, three hundred twenty-one".