313715321 has 4 divisors (see below), whose sum is σ = 319634532. Its totient is φ = 307796112.

The previous prime is 313715293. The next prime is 313715329. The reversal of 313715321 is 123517313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123517313 = 2399 ⋅51487.

It can be written as a sum of positive squares in 2 ways, for example, as 259854400 + 53860921 = 16120^2 + 7339^2 .

It is a cyclic number.

It is not a de Polignac number, because 313715321 - 2¹⁴ = 313698937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313715329) 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, 2959526 + ... + 2959631.

It is an arithmetic number, because the mean of its divisors is an integer number (79908633).

Almost surely, 2^313715321 is an apocalyptic number.

It is an amenable number.

313715321 is a deficient number, since it is larger than the sum of its proper divisors (5919211).

313715321 is an equidigital number, since it uses as much as digits as its factorization.

313715321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919210.

The product of its digits is 1890, while the sum is 26.

The square root of 313715321 is about 17712.0106424991. The cubic root of 313715321 is about 679.4829698710.

The spelling of 313715321 in words is "three hundred thirteen million, seven hundred fifteen thousand, three hundred twenty-one".