320331229 has 2 divisors, whose sum is σ = 320331230. Its totient is φ = 320331228.

The previous prime is 320331181. The next prime is 320331233. The reversal of 320331229 is 922133023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318087225 + 2244004 = 17835^2 + 1498^2 .

It is a cyclic number.

It is not a de Polignac number, because 320331229 - 2⁷ = 320331101 is a prime.

It is a super-2 number, since 2×320331229² = 205224192545300882, which contains 22 as substring.

It is a congruent 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160165614 + 160165615.

It is an arithmetic number, because the mean of its divisors is an integer number (160165615).

Almost surely, 2^320331229 is an apocalyptic number.

It is an amenable number.

320331229 is a deficient number, since it is larger than the sum of its proper divisors (1).

320331229 is an equidigital number, since it uses as much as digits as its factorization.

320331229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 320331229 is about 17897.7995574875. The cubic root of 320331229 is about 684.2262946341.

The spelling of 320331229 in words is "three hundred twenty million, three hundred thirty-one thousand, two hundred twenty-nine".