331303613 has 4 divisors (see below), whose sum is σ = 331500540. Its totient is φ = 331106688.

The previous prime is 331303579. The next prime is 331303619. The reversal of 331303613 is 316303133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316303133 = 929 ⋅340477.

It can be written as a sum of positive squares in 2 ways, for example, as 237252409 + 94051204 = 15403^2 + 9698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331303613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331303619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95918 + ... + 99311.

It is an arithmetic number, because the mean of its divisors is an integer number (82875135).

Almost surely, 2^331303613 is an apocalyptic number.

It is an amenable number.

331303613 is a deficient number, since it is larger than the sum of its proper divisors (196927).

331303613 is a wasteful number, since it uses less digits than its factorization.

331303613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196926.

The product of its (nonzero) digits is 1458, while the sum is 23.

The square root of 331303613 is about 18201.7475259932. The cubic root of 331303613 is about 691.9510786860.

Adding to 331303613 its reverse (316303133), we get a palindrome (647606746).

The spelling of 331303613 in words is "three hundred thirty-one million, three hundred three thousand, six hundred thirteen".