320235161 has 2 divisors, whose sum is σ = 320235162. Its totient is φ = 320235160.

The previous prime is 320235151. The next prime is 320235163. The reversal of 320235161 is 161532023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177289225 + 142945936 = 13315^2 + 11956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320235161 is a prime.

Together with 320235163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320235163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160117580 + 160117581.

It is an arithmetic number, because the mean of its divisors is an integer number (160117581).

Almost surely, 2^320235161 is an apocalyptic number.

It is an amenable number.

320235161 is a deficient number, since it is larger than the sum of its proper divisors (1).

320235161 is an equidigital number, since it uses as much as digits as its factorization.

320235161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 320235161 is about 17895.1155626333. The cubic root of 320235161 is about 684.1578875002.

Adding to 320235161 its reverse (161532023), we get a palindrome (481767184).

The spelling of 320235161 in words is "three hundred twenty million, two hundred thirty-five thousand, one hundred sixty-one".