331421442013 has 2 divisors, whose sum is σ = 331421442014. Its totient is φ = 331421442012.

The previous prime is 331421441993. The next prime is 331421442017. The reversal of 331421442013 is 310244124133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199883208889 + 131538233124 = 447083^2 + 362682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331421442013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331421442017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165710721006 + 165710721007.

It is an arithmetic number, because the mean of its divisors is an integer number (165710721007).

Almost surely, 2^331421442013 is an apocalyptic number.

It is an amenable number.

331421442013 is a deficient number, since it is larger than the sum of its proper divisors (1).

331421442013 is an equidigital number, since it uses as much as digits as its factorization.

331421442013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 331421442013 its reverse (310244124133), we get a palindrome (641665566146).

The spelling of 331421442013 in words is "three hundred thirty-one billion, four hundred twenty-one million, four hundred forty-two thousand, thirteen".