13256181 has 6 divisors (see below), whose sum is σ = 19147830. Its totient is φ = 8837448.

The previous prime is 13256147. The next prime is 13256183. The reversal of 13256181 is 18165231.

13256181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7452900 + 5803281 = 2730^2 + 2409^2 .

It is not a de Polignac number, because 13256181 - 2¹⁰ = 13255157 is a prime.

It is a super-2 number, since 2×13256181² = 351452669409522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13256183) 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 in 5 ways as a sum of consecutive naturals, for example, 736446 + ... + 736463.

It is an arithmetic number, because the mean of its divisors is an integer number (3191305).

Almost surely, 2^13256181 is an apocalyptic number.

It is an amenable number.

13256181 is a deficient number, since it is larger than the sum of its proper divisors (5891649).

13256181 is a wasteful number, since it uses less digits than its factorization.

13256181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472915 (or 1472912 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 13256181 is about 3640.9038712935. The cubic root of 13256181 is about 236.6679642416.

The spelling of 13256181 in words is "thirteen million, two hundred fifty-six thousand, one hundred eighty-one".