13681181 has 8 divisors (see below), whose sum is σ = 14139840. Its totient is φ = 13228992.

The previous prime is 13681163. The next prime is 13681211. The reversal of 13681181 is 18118631.

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 13681181 - 2⁶ = 13681117 is a prime.

It is a super-2 number, since 2×13681181² = 374349427109522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13611181) 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, 2885 + ... + 5973.

It is an arithmetic number, because the mean of its divisors is an integer number (1767480).

Almost surely, 2^13681181 is an apocalyptic number.

It is an amenable number.

13681181 is a deficient number, since it is larger than the sum of its proper divisors (458659).

13681181 is a wasteful number, since it uses less digits than its factorization.

13681181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its digits is 1152, while the sum is 29.

The square root of 13681181 is about 3698.8080512511. The cubic root of 13681181 is about 239.1706384564.

The spelling of 13681181 in words is "thirteen million, six hundred eighty-one thousand, one hundred eighty-one".