331566241 has 2 divisors, whose sum is σ = 331566242. Its totient is φ = 331566240.

The previous prime is 331566233. The next prime is 331566271. The reversal of 331566241 is 142665133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331385616 + 180625 = 18204^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 331566241 - 2³ = 331566233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331566211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165783120 + 165783121.

It is an arithmetic number, because the mean of its divisors is an integer number (165783121).

Almost surely, 2^331566241 is an apocalyptic number.

It is an amenable number.

331566241 is a deficient number, since it is larger than the sum of its proper divisors (1).

331566241 is an equidigital number, since it uses as much as digits as its factorization.

331566241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 331566241 is about 18208.9604590707. The cubic root of 331566241 is about 692.1338694588.

The spelling of 331566241 in words is "three hundred thirty-one million, five hundred sixty-six thousand, two hundred forty-one".