12313181 has 2 divisors, whose sum is σ = 12313182. Its totient is φ = 12313180.

The previous prime is 12313157. The next prime is 12313187. The reversal of 12313181 is 18131321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 100 = 3509^2 + 10^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12313181 is a prime.

It is a super-2 number, since 2×12313181² = 303228852677522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12313187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156590 + 6156591.

It is an arithmetic number, because the mean of its divisors is an integer number (6156591).

Almost surely, 2^12313181 is an apocalyptic number.

It is an amenable number.

12313181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12313181 is an equidigital number, since it uses as much as digits as its factorization.

12313181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 12313181 is about 3509.0142490449. The cubic root of 12313181 is about 230.9174508112.

The spelling of 12313181 in words is "twelve million, three hundred thirteen thousand, one hundred eighty-one".