231230161 has 2 divisors, whose sum is σ = 231230162. Its totient is φ = 231230160.

The previous prime is 231230143. The next prime is 231230183. The reversal of 231230161 is 161032132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212576400 + 18653761 = 14580^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 231230161 - 2¹¹ = 231228113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231290161) 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 as a sum of consecutive naturals, namely, 115615080 + 115615081.

It is an arithmetic number, because the mean of its divisors is an integer number (115615081).

Almost surely, 2^231230161 is an apocalyptic number.

It is an amenable number.

231230161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231230161 is an equidigital number, since it uses as much as digits as its factorization.

231230161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 231230161 is about 15206.2540094528. The cubic root of 231230161 is about 613.7829598901.

Adding to 231230161 its reverse (161032132), we get a palindrome (392262293).

The spelling of 231230161 in words is "two hundred thirty-one million, two hundred thirty thousand, one hundred sixty-one".