13681131 has 8 divisors (see below), whose sum is σ = 18293760. Its totient is φ = 9094632.

The previous prime is 13681117. The next prime is 13681163. The reversal of 13681131 is 13118631.

13681131 is digitally balanced in base 2, 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 not a de Polignac number, because 13681131 - 2⁵ = 13681099 is a prime.

It is a super-2 number, since 2×13681131² = 374346690878322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13681531) 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, 5275 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (2286720).

Almost surely, 2^13681131 is an apocalyptic number.

13681131 is a deficient number, since it is larger than the sum of its proper divisors (4612629).

13681131 is a wasteful number, since it uses less digits than its factorization.

13681131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13065.

The product of its digits is 432, while the sum is 24.

The square root of 13681131 is about 3698.8012923108. The cubic root of 13681131 is about 239.1703470939.

Adding to 13681131 its reverse (13118631), we get a palindrome (26799762).

Subtracting from 13681131 its reverse (13118631), we obtain a square (562500 = 750²).

The spelling of 13681131 in words is "thirteen million, six hundred eighty-one thousand, one hundred thirty-one".