13866181 has 16 divisors (see below), whose sum is σ = 16824960. Its totient is φ = 11162880.

The previous prime is 13866173. The next prime is 13866191. The reversal of 13866181 is 18166831.

13866181 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13866181 - 2³ = 13866173 is a prime.

It is a super-2 number, since 2×13866181² = 384541951049522, which contains 22 as substring.

It is a Duffinian number.

13866181 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13866191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17841 + ... + 18601.

It is an arithmetic number, because the mean of its divisors is an integer number (1051560).

Almost surely, 2^13866181 is an apocalyptic number.

It is an amenable number.

13866181 is a deficient number, since it is larger than the sum of its proper divisors (2958779).

13866181 is a wasteful number, since it uses less digits than its factorization.

13866181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its digits is 6912, while the sum is 34.

The square root of 13866181 is about 3723.7321332233. The cubic root of 13866181 is about 240.2438551531.

The spelling of 13866181 in words is "thirteen million, eight hundred sixty-six thousand, one hundred eighty-one".