320404331 has 8 divisors (see below), whose sum is σ = 348277104. Its totient is φ = 292992480.

The previous prime is 320404307. The next prime is 320404351. The reversal of 320404331 is 133404023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320404331 is a prime.

It is a super-2 number, since 2×320404331² = 205317870647115122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320404351) 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 in 7 ways as a sum of consecutive naturals, for example, 113780 + ... + 116561.

It is an arithmetic number, because the mean of its divisors is an integer number (43534638).

Almost surely, 2^320404331 is an apocalyptic number.

320404331 is a deficient number, since it is larger than the sum of its proper divisors (27872773).

320404331 is a wasteful number, since it uses less digits than its factorization.

320404331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230461.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320404331 is about 17899.8416473443. The cubic root of 320404331 is about 684.2783392072.

Adding to 320404331 its reverse (133404023), we get a palindrome (453808354).

The spelling of 320404331 in words is "three hundred twenty million, four hundred four thousand, three hundred thirty-one".