331541320361 has 2 divisors, whose sum is σ = 331541320362. Its totient is φ = 331541320360.

The previous prime is 331541320351. The next prime is 331541320423. The reversal of 331541320361 is 163023145133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252939590761 + 78601729600 = 502931^2 + 280360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331541320361 is a prime.

It is not a weakly prime, because it can be changed into another prime (331541320351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165770660180 + 165770660181.

It is an arithmetic number, because the mean of its divisors is an integer number (165770660181).

Almost surely, 2^331541320361 is an apocalyptic number.

It is an amenable number.

331541320361 is a deficient number, since it is larger than the sum of its proper divisors (1).

331541320361 is an equidigital number, since it uses as much as digits as its factorization.

331541320361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 331541320361 its reverse (163023145133), we get a palindrome (494564465494).

The spelling of 331541320361 in words is "three hundred thirty-one billion, five hundred forty-one million, three hundred twenty thousand, three hundred sixty-one".