320311312 has 10 divisors (see below), whose sum is σ = 620603198. Its totient is φ = 160155648.

The previous prime is 320311309. The next prime is 320311319. The reversal of 320311312 is 213113023.

It can be written as a sum of positive squares in only one way, i.e., 263218176 + 57093136 = 16224^2 + 7556^2 .

It is a super-2 number, since 2×320311312² = 205198673190322688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 20019457 = 320311312 / (3 + 2 + 0 + 3 + 1 + 1 + 3 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (320311319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009713 + ... + 10009744.

Almost surely, 2^320311312 is an apocalyptic number.

It is an amenable number.

320311312 is a deficient number, since it is larger than the sum of its proper divisors (300291886).

320311312 is a wasteful number, since it uses less digits than its factorization.

320311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20019465 (or 20019459 counting only the distinct ones).

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

The square root of 320311312 is about 17897.2431396570. The cubic root of 320311312 is about 684.2121134613.

Adding to 320311312 its reverse (213113023), we get a palindrome (533424335).

The spelling of 320311312 in words is "three hundred twenty million, three hundred eleven thousand, three hundred twelve".