331225405109 has 2 divisors, whose sum is σ = 331225405110. Its totient is φ = 331225405108.

The previous prime is 331225405099. The next prime is 331225405123. The reversal of 331225405109 is 901504522133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177754992100 + 153470413009 = 421610^2 + 391753^2 .

It is a cyclic number.

It is not a de Polignac number, because 331225405109 - 2²⁸ = 330956969653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331225405129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165612702554 + 165612702555.

It is an arithmetic number, because the mean of its divisors is an integer number (165612702555).

Almost surely, 2^331225405109 is an apocalyptic number.

It is an amenable number.

331225405109 is a deficient number, since it is larger than the sum of its proper divisors (1).

331225405109 is an equidigital number, since it uses as much as digits as its factorization.

331225405109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 331225405109 in words is "three hundred thirty-one billion, two hundred twenty-five million, four hundred five thousand, one hundred nine".