320223313 has 4 divisors (see below), whose sum is σ = 320370228. Its totient is φ = 320076400.

The previous prime is 320223289. The next prime is 320223331. The reversal of 320223313 is 313322023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 260887104 + 59336209 = 16152^2 + 7703^2 .

It is a cyclic number.

It is not a de Polignac number, because 320223313 - 2²⁵ = 286668881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320223383) 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, 70138 + ... + 74563.

It is an arithmetic number, because the mean of its divisors is an integer number (80092557).

Almost surely, 2^320223313 is an apocalyptic number.

It is an amenable number.

320223313 is a deficient number, since it is larger than the sum of its proper divisors (146915).

320223313 is a wasteful number, since it uses less digits than its factorization.

320223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146914.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320223313 is about 17894.7845195185. The cubic root of 320223313 is about 684.1494499480.

Adding to 320223313 its reverse (313322023), we get a palindrome (633545336).

The spelling of 320223313 in words is "three hundred twenty million, two hundred twenty-three thousand, three hundred thirteen".