320442229 has 2 divisors, whose sum is σ = 320442230. Its totient is φ = 320442228.

The previous prime is 320442217. The next prime is 320442247. The reversal of 320442229 is 922244023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308002500 + 12439729 = 17550^2 + 3527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320442229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320442197 and 320442206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320442289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160221114 + 160221115.

It is an arithmetic number, because the mean of its divisors is an integer number (160221115).

Almost surely, 2^320442229 is an apocalyptic number.

It is an amenable number.

320442229 is a deficient number, since it is larger than the sum of its proper divisors (1).

320442229 is an equidigital number, since it uses as much as digits as its factorization.

320442229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 320442229 is about 17900.9002287594. The cubic root of 320442229 is about 684.3053173674.

The spelling of 320442229 in words is "three hundred twenty million, four hundred forty-two thousand, two hundred twenty-nine".