331223420444431 has 2 divisors, whose sum is σ = 331223420444432. Its totient is φ = 331223420444430.

The previous prime is 331223420444377. The next prime is 331223420444471. The reversal of 331223420444431 is 134444024322133.

It is a happy number.

It is an a-pointer prime, because the next prime (331223420444471) can be obtained adding 331223420444431 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331223420444431 - 2³¹ = 331221272960783 is a prime.

It is a super-2 number, since 2×331223420444431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331223420444471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165611710222215 + 165611710222216.

It is an arithmetic number, because the mean of its divisors is an integer number (165611710222216).

Almost surely, 2^{331223420444431} is an apocalyptic number.

331223420444431 is a deficient number, since it is larger than the sum of its proper divisors (1).

331223420444431 is an equidigital number, since it uses as much as digits as its factorization.

331223420444431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 331223420444431 its reverse (134444024322133), we get a palindrome (465667444766564).

The spelling of 331223420444431 in words is "three hundred thirty-one trillion, two hundred twenty-three billion, four hundred twenty million, four hundred forty-four thousand, four hundred thirty-one".