331340423209 has 2 divisors, whose sum is σ = 331340423210. Its totient is φ = 331340423208.

The previous prime is 331340423177. The next prime is 331340423231. The reversal of 331340423209 is 902324043133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232061865984 + 99278557225 = 481728^2 + 315085^2 .

It is a cyclic number.

It is not a de Polignac number, because 331340423209 - 2⁵ = 331340423177 is a prime.

It is not a weakly prime, because it can be changed into another prime (331340423509) 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, 165670211604 + 165670211605.

It is an arithmetic number, because the mean of its divisors is an integer number (165670211605).

Almost surely, 2^331340423209 is an apocalyptic number.

It is an amenable number.

331340423209 is a deficient number, since it is larger than the sum of its proper divisors (1).

331340423209 is an equidigital number, since it uses as much as digits as its factorization.

331340423209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 34.

The spelling of 331340423209 in words is "three hundred thirty-one billion, three hundred forty million, four hundred twenty-three thousand, two hundred nine".