331002013 has 4 divisors (see below), whose sum is σ = 337247388. Its totient is φ = 324756640.

The previous prime is 331002011. The next prime is 331002031. The reversal of 331002013 is 310200133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310200133 = 83 ⋅3737351.

It can be written as a sum of positive squares in 2 ways, for example, as 213539769 + 117462244 = 14613^2 + 10838^2 .

It is a cyclic number.

It is not a de Polignac number, because 331002013 - 2¹ = 331002011 is a prime.

It is a super-2 number, since 2×331002013² = 219124665220104338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331001984 and 331002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331002011) 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, 3122608 + ... + 3122713.

It is an arithmetic number, because the mean of its divisors is an integer number (84311847).

Almost surely, 2^331002013 is an apocalyptic number.

It is an amenable number.

331002013 is a deficient number, since it is larger than the sum of its proper divisors (6245375).

331002013 is an equidigital number, since it uses as much as digits as its factorization.

331002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245374.

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

The square root of 331002013 is about 18193.4607208194. The cubic root of 331002013 is about 691.7410439460.

Adding to 331002013 its reverse (310200133), we get a palindrome (641202146).

The spelling of 331002013 in words is "three hundred thirty-one million, two thousand, thirteen".