143231161 has 2 divisors, whose sum is σ = 143231162. Its totient is φ = 143231160.

The previous prime is 143231159. The next prime is 143231219. The reversal of 143231161 is 161132341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142922025 + 309136 = 11955^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 143231161 - 2¹ = 143231159 is a prime.

Together with 143231159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (143231761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71615580 + 71615581.

It is an arithmetic number, because the mean of its divisors is an integer number (71615581).

Almost surely, 2^143231161 is an apocalyptic number.

It is an amenable number.

143231161 is a deficient number, since it is larger than the sum of its proper divisors (1).

143231161 is an equidigital number, since it uses as much as digits as its factorization.

143231161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 143231161 is about 11967.9221671934. The cubic root of 143231161 is about 523.2137765846.

The spelling of 143231161 in words is "one hundred forty-three million, two hundred thirty-one thousand, one hundred sixty-one".