12163181 has 2 divisors, whose sum is σ = 12163182. Its totient is φ = 12163180.

The previous prime is 12163147. The next prime is 12163231. The reversal of 12163181 is 18136121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 17956 = 3485^2 + 134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12163181 is a prime.

It is a super-2 number, since 2×12163181² = 295885944077522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12163681) 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, 6081590 + 6081591.

It is an arithmetic number, because the mean of its divisors is an integer number (6081591).

Almost surely, 2^12163181 is an apocalyptic number.

It is an amenable number.

12163181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12163181 is an equidigital number, since it uses as much as digits as its factorization.

12163181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 12163181 is about 3487.5752321635. The cubic root of 12163181 is about 229.9759332096.

The spelling of 12163181 in words is "twelve million, one hundred sixty-three thousand, one hundred eighty-one".