331002313 has 2 divisors, whose sum is σ = 331002314. Its totient is φ = 331002312.

The previous prime is 331002299. The next prime is 331002349. The reversal of 331002313 is 313200133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326452624 + 4549689 = 18068^2 + 2133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331002313 is a prime.

It is a super-2 number, since 2×331002313² = 219125062422699938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331002383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165501156 + 165501157.

It is an arithmetic number, because the mean of its divisors is an integer number (165501157).

Almost surely, 2^331002313 is an apocalyptic number.

It is an amenable number.

331002313 is a deficient number, since it is larger than the sum of its proper divisors (1).

331002313 is an equidigital number, since it uses as much as digits as its factorization.

331002313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 331002313 is about 18193.4689655382. The cubic root of 331002313 is about 691.7412529299.

Adding to 331002313 its reverse (313200133), we get a palindrome (644202446).

The spelling of 331002313 in words is "three hundred thirty-one million, two thousand, three hundred thirteen".