13663181 has 8 divisors (see below), whose sum is σ = 15661440. Its totient is φ = 11676528.

The previous prime is 13663159. The next prime is 13663183. The reversal of 13663181 is 18136631.

13663181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13663181 - 2¹⁰ = 13662157 is a prime.

It is a super-2 number, since 2×13663181² = 373365030077522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (1957680).

Almost surely, 2^13663181 is an apocalyptic number.

It is an amenable number.

13663181 is a deficient number, since it is larger than the sum of its proper divisors (1998259).

13663181 is an equidigital number, since it uses as much as digits as its factorization.

13663181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5803.

The product of its digits is 2592, while the sum is 29.

The square root of 13663181 is about 3696.3740341042. The cubic root of 13663181 is about 239.0657020745.

The spelling of 13663181 in words is "thirteen million, six hundred sixty-three thousand, one hundred eighty-one".