331325009 has 2 divisors, whose sum is σ = 331325010. Its totient is φ = 331325008.

The previous prime is 331325003. The next prime is 331325039. The reversal of 331325009 is 900523133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320302609 + 11022400 = 17897^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 331325009 - 2⁸ = 331324753 is a prime.

It is not a weakly prime, because it can be changed into another prime (331325003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165662504 + 165662505.

It is an arithmetic number, because the mean of its divisors is an integer number (165662505).

Almost surely, 2^331325009 is an apocalyptic number.

It is an amenable number.

331325009 is a deficient number, since it is larger than the sum of its proper divisors (1).

331325009 is an equidigital number, since it uses as much as digits as its factorization.

331325009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 331325009 is about 18202.3352622679. The cubic root of 331325009 is about 691.9659740528.

The spelling of 331325009 in words is "three hundred thirty-one million, three hundred twenty-five thousand, nine".