331403243 has 2 divisors, whose sum is σ = 331403244. Its totient is φ = 331403242.

The previous prime is 331403203. The next prime is 331403269. The reversal of 331403243 is 342304133.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331403243 - 2⁸ = 331402987 is a prime.

It is not a weakly prime, because it can be changed into another prime (331403203) 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, 165701621 + 165701622.

It is an arithmetic number, because the mean of its divisors is an integer number (165701622).

Almost surely, 2^331403243 is an apocalyptic number.

331403243 is a deficient number, since it is larger than the sum of its proper divisors (1).

331403243 is an equidigital number, since it uses as much as digits as its factorization.

331403243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 331403243 is about 18204.4841453967. The cubic root of 331403243 is about 692.0204331733.

Adding to 331403243 its reverse (342304133), we get a palindrome (673707376).

The spelling of 331403243 in words is "three hundred thirty-one million, four hundred three thousand, two hundred forty-three".