331191531067541 has 2 divisors, whose sum is σ = 331191531067542. Its totient is φ = 331191531067540.

The previous prime is 331191531067531. The next prime is 331191531067547. The reversal of 331191531067541 is 145760135191133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212750666700625 + 118440864366916 = 14585975^2 + 10883054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331191531067541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331191531067541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331191531067547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165595765533770 + 165595765533771.

It is an arithmetic number, because the mean of its divisors is an integer number (165595765533771).

Almost surely, 2^{331191531067541} is an apocalyptic number.

It is an amenable number.

331191531067541 is a deficient number, since it is larger than the sum of its proper divisors (1).

331191531067541 is an equidigital number, since it uses as much as digits as its factorization.

331191531067541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 331191531067541 in words is "three hundred thirty-one trillion, one hundred ninety-one billion, five hundred thirty-one million, sixty-seven thousand, five hundred forty-one".