13113181 has 2 divisors, whose sum is σ = 13113182. Its totient is φ = 13113180.

The previous prime is 13113167. The next prime is 13113223. The reversal of 13113181 is 18131131.

13113181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6937956 + 6175225 = 2634^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 13113181 - 2⁷ = 13113053 is a prime.

It is a super-2 number, since 2×13113181² = 343911031877522, 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 (13113161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6556590 + 6556591.

It is an arithmetic number, because the mean of its divisors is an integer number (6556591).

Almost surely, 2^13113181 is an apocalyptic number.

It is an amenable number.

13113181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13113181 is an equidigital number, since it uses as much as digits as its factorization.

13113181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

The square root of 13113181 is about 3621.2126421960. The cubic root of 13113181 is about 235.8138734028.

The spelling of 13113181 in words is "thirteen million, one hundred thirteen thousand, one hundred eighty-one".