331313 has 4 divisors (see below), whose sum is σ = 350820. Its totient is φ = 311808.

The previous prime is 331307. The next prime is 331319. The reversal of 331313 is 313133.

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

It is an interprime number because it is at equal distance from previous prime (331307) and next prime (331319).

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 223729 = 328^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 331313 - 2⁶ = 331249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331319) 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, 9728 + ... + 9761.

It is an arithmetic number, because the mean of its divisors is an integer number (87705).

2³³¹³¹³ is an apocalyptic number.

It is an amenable number.

331313 is a deficient number, since it is larger than the sum of its proper divisors (19507).

331313 is a wasteful number, since it uses less digits than its factorization.

331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19506.

The product of its digits is 81, while the sum is 14.

The square root of 331313 is about 575.5979499616. The cubic root of 331313 is about 69.1957613763.

Adding to 331313 its reverse (313133), we get a palindrome (644446).

It can be divided in two parts, 3 and 31313, that multiplied together give a palindrome (93939).

The spelling of 331313 in words is "three hundred thirty-one thousand, three hundred thirteen".