320112313 has 4 divisors (see below), whose sum is σ = 320430580. Its totient is φ = 319794048.

The previous prime is 320112283. The next prime is 320112341. The reversal of 320112313 is 313211023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313211023 = 12941 ⋅24203.

It can be written as a sum of positive squares in 2 ways, for example, as 92313664 + 227798649 = 9608^2 + 15093^2 .

It is a cyclic number.

It is not a de Polignac number, because 320112313 - 2⁵ = 320112281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320112713) 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, 157620 + ... + 159637.

It is an arithmetic number, because the mean of its divisors is an integer number (80107645).

Almost surely, 2^320112313 is an apocalyptic number.

It is an amenable number.

320112313 is a deficient number, since it is larger than the sum of its proper divisors (318267).

320112313 is a wasteful number, since it uses less digits than its factorization.

320112313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318266.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320112313 is about 17891.6827883796. The cubic root of 320112313 is about 684.0703911974.

Adding to 320112313 its reverse (313211023), we get a palindrome (633323336).

The spelling of 320112313 in words is "three hundred twenty million, one hundred twelve thousand, three hundred thirteen".