331308413 has 4 divisors (see below), whose sum is σ = 339389148. Its totient is φ = 323227680.

The previous prime is 331308401. The next prime is 331308431. The reversal of 331308413 is 314803133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314803133 = 47 ⋅6697939.

It can be written as a sum of positive squares in 2 ways, for example, as 5938969 + 325369444 = 2437^2 + 18038^2 .

It is a cyclic number.

It is not a de Polignac number, because 331308413 - 2⁶ = 331308349 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 (331308713) 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, 4040306 + ... + 4040387.

It is an arithmetic number, because the mean of its divisors is an integer number (84847287).

Almost surely, 2^331308413 is an apocalyptic number.

It is an amenable number.

331308413 is a deficient number, since it is larger than the sum of its proper divisors (8080735).

331308413 is an equidigital number, since it uses as much as digits as its factorization.

331308413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080734.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 331308413 is about 18201.8793809870. The cubic root of 331308413 is about 691.9544203832.

The spelling of 331308413 in words is "three hundred thirty-one million, three hundred eight thousand, four hundred thirteen".