1182231161 has 2 divisors, whose sum is σ = 1182231162. Its totient is φ = 1182231160.

The previous prime is 1182231151. The next prime is 1182231163. The reversal of 1182231161 is 1611322811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085307136 + 96924025 = 32944^2 + 9845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1182231161 - 2¹⁴ = 1182214777 is a prime.

Together with 1182231163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1182231161.

It is not a weakly prime, because it can be changed into another prime (1182231163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591115580 + 591115581.

It is an arithmetic number, because the mean of its divisors is an integer number (591115581).

Almost surely, 2^1182231161 is an apocalyptic number.

It is an amenable number.

1182231161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1182231161 is an equidigital number, since it uses as much as digits as its factorization.

1182231161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The square root of 1182231161 is about 34383.5885416284. The cubic root of 1182231161 is about 1057.3874075292.

Adding to 1182231161 its reverse (1611322811), we get a palindrome (2793553972).

The spelling of 1182231161 in words is "one billion, one hundred eighty-two million, two hundred thirty-one thousand, one hundred sixty-one".