320443161 has 16 divisors (see below), whose sum is σ = 431576640. Its totient is φ = 211477760.

The previous prime is 320443159. The next prime is 320443169. The reversal of 320443161 is 161344023.

It is a cyclic number.

It is not a de Polignac number, because 320443161 - 2¹ = 320443159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320443169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222901 + ... + 224333.

It is an arithmetic number, because the mean of its divisors is an integer number (26973540).

Almost surely, 2^320443161 is an apocalyptic number.

It is an amenable number.

320443161 is a deficient number, since it is larger than the sum of its proper divisors (111133479).

320443161 is a wasteful number, since it uses less digits than its factorization.

320443161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 320443161 is about 17900.9262609509. The cubic root of 320443161 is about 684.3059807964.

Adding to 320443161 its reverse (161344023), we get a palindrome (481787184).

The spelling of 320443161 in words is "three hundred twenty million, four hundred forty-three thousand, one hundred sixty-one".