331329 has 8 divisors (see below), whose sum is σ = 444960. Its totient is φ = 219296.

The previous prime is 331319. The next prime is 331333. The reversal of 331329 is 923133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331329 - 2¹¹ = 329281 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (331319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (55620).

2³³¹³²⁹ is an apocalyptic number.

It is an amenable number.

331329 is a deficient number, since it is larger than the sum of its proper divisors (113631).

331329 is a wasteful number, since it uses less digits than its factorization.

331329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 486, while the sum is 21.

The square root of 331329 is about 575.6118483840. The cubic root of 331329 is about 69.1968752418.

The spelling of 331329 in words is "three hundred thirty-one thousand, three hundred twenty-nine".