331323009 has 24 divisors (see below), whose sum is σ = 467774496. Its totient is φ = 208468800.

The previous prime is 331322989. The next prime is 331323023. The reversal of 331323009 is 900323133.

It is not a de Polignac number, because 331323009 - 2¹⁵ = 331290241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331323009.

It is not an unprimeable number, because it can be changed into a prime (331323029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116802 + ... + 119604.

It is an arithmetic number, because the mean of its divisors is an integer number (19490604).

Almost surely, 2^331323009 is an apocalyptic number.

It is an amenable number.

331323009 is a deficient number, since it is larger than the sum of its proper divisors (136451487).

331323009 is a wasteful number, since it uses less digits than its factorization.

331323009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 24.

The square root of 331323009 is about 18202.2803241792. The cubic root of 331323009 is about 691.9645817294.

The spelling of 331323009 in words is "three hundred thirty-one million, three hundred twenty-three thousand, nine".