320112161 has 2 divisors, whose sum is σ = 320112162. Its totient is φ = 320112160.

The previous prime is 320112157. The next prime is 320112173. The reversal of 320112161 is 161211023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261436561 + 58675600 = 16169^2 + 7660^2 .

It is a cyclic number.

It is not a de Polignac number, because 320112161 - 2² = 320112157 is a prime.

It is not a weakly prime, because it can be changed into another prime (320112101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160056080 + 160056081.

It is an arithmetic number, because the mean of its divisors is an integer number (160056081).

Almost surely, 2^320112161 is an apocalyptic number.

It is an amenable number.

320112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

320112161 is an equidigital number, since it uses as much as digits as its factorization.

320112161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 320112161 is about 17891.6785405953. The cubic root of 320112161 is about 684.0702829242.

Adding to 320112161 its reverse (161211023), we get a palindrome (481323184).

The spelling of 320112161 in words is "three hundred twenty million, one hundred twelve thousand, one hundred sixty-one".