331312 has 10 divisors (see below), whose sum is σ = 641948. Its totient is φ = 165648.

The previous prime is 331307. The next prime is 331319. The reversal of 331312 is 213133.

It is a junction number, because it is equal to n+sod(n) for n = 331292 and 331301.

It is not an unprimeable number, because it can be changed into a prime (331319) by changing a digit.

331312 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338 + ... + 10369.

2³³¹³¹² is an apocalyptic number.

It is an amenable number.

331312 is a deficient number, since it is larger than the sum of its proper divisors (310636).

331312 is a wasteful number, since it uses less digits than its factorization.

331312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20715 (or 20709 counting only the distinct ones).

The product of its digits is 54, while the sum is 13.

The square root of 331312 is about 575.5970812991. The cubic root of 331312 is about 69.1956917585.

Adding to 331312 its reverse (213133), we get a palindrome (544445).

It can be divided in two parts, 33131 and 2, that added together give a palindrome (33133).

The spelling of 331312 in words is "three hundred thirty-one thousand, three hundred twelve".