320331233 has 2 divisors, whose sum is σ = 320331234. Its totient is φ = 320331232.

The previous prime is 320331229. The next prime is 320331239. The reversal of 320331233 is 332133023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233692369 + 86638864 = 15287^2 + 9308^2 .

It is an emirp because it is prime and its reverse (332133023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320331233 - 2² = 320331229 is a prime.

It is a super-2 number, since 2×320331233² = 205224197670600578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320331239) 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, 160165616 + 160165617.

It is an arithmetic number, because the mean of its divisors is an integer number (160165617).

Almost surely, 2^320331233 is an apocalyptic number.

It is an amenable number.

320331233 is a deficient number, since it is larger than the sum of its proper divisors (1).

320331233 is an equidigital number, since it uses as much as digits as its factorization.

320331233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 320331233 is about 17897.7996692331. The cubic root of 320331233 is about 684.2262974821.

Adding to 320331233 its reverse (332133023), we get a palindrome (652464256).

The spelling of 320331233 in words is "three hundred twenty million, three hundred thirty-one thousand, two hundred thirty-three".