331256845901 has 2 divisors, whose sum is σ = 331256845902. Its totient is φ = 331256845900.

The previous prime is 331256845891. The next prime is 331256845961. The reversal of 331256845901 is 109548652133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263903101225 + 67353744676 = 513715^2 + 259526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331256845901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331256845961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165628422950 + 165628422951.

It is an arithmetic number, because the mean of its divisors is an integer number (165628422951).

Almost surely, 2^331256845901 is an apocalyptic number.

It is an amenable number.

331256845901 is a deficient number, since it is larger than the sum of its proper divisors (1).

331256845901 is an equidigital number, since it uses as much as digits as its factorization.

331256845901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 331256845901 in words is "three hundred thirty-one billion, two hundred fifty-six million, eight hundred forty-five thousand, nine hundred one".