331042013 has 4 divisors (see below), whose sum is σ = 345435168. Its totient is φ = 316648860.

The previous prime is 331042001. The next prime is 331042021. The reversal of 331042013 is 310240133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310240133 = 7 ⋅44320019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331042013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331041982 and 331042000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331042213) 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, 7196543 + ... + 7196588.

It is an arithmetic number, because the mean of its divisors is an integer number (86358792).

Almost surely, 2^331042013 is an apocalyptic number.

It is an amenable number.

331042013 is a deficient number, since it is larger than the sum of its proper divisors (14393155).

331042013 is a wasteful number, since it uses less digits than its factorization.

331042013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14393154.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331042013 is about 18194.5599836874. The cubic root of 331042013 is about 691.7689073488.

Adding to 331042013 its reverse (310240133), we get a palindrome (641282146).

The spelling of 331042013 in words is "three hundred thirty-one million, forty-two thousand, thirteen".