3133181 has 2 divisors, whose sum is σ = 3133182. Its totient is φ = 3133180.

The previous prime is 3133177. The next prime is 3133183. The reversal of 3133181 is 1813313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 17956 = 1765^2 + 134^2 .

It is an emirp because it is prime and its reverse (1813313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3133181 - 2² = 3133177 is a prime.

It is a super-2 number, since 2×3133181² = 19633646357522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3133183, it forms a pair of twin primes.

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 (3133183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1566590 + 1566591.

It is an arithmetic number, because the mean of its divisors is an integer number (1566591).

Almost surely, 2^3133181 is an apocalyptic number.

It is an amenable number.

3133181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3133181 is an equidigital number, since it uses as much as digits as its factorization.

3133181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 3133181 is about 1770.0793767512. The cubic root of 3133181 is about 146.3283564822.

Adding to 3133181 its reverse (1813313), we get a palindrome (4946494).

The spelling of 3133181 in words is "three million, one hundred thirty-three thousand, one hundred eighty-one".