13871131 has 4 divisors (see below), whose sum is σ = 13882912. Its totient is φ = 13859352.

The previous prime is 13871129. The next prime is 13871141. The reversal of 13871131 is 13117831.

13871131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13871131 - 2¹ = 13871129 is a prime.

It is a super-2 number, since 2×13871131² = 384816550438322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13871096 and 13871105.

It is not an unprimeable number, because it can be changed into a prime (13871141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (3470728).

Almost surely, 2^13871131 is an apocalyptic number.

13871131 is a deficient number, since it is larger than the sum of its proper divisors (11781).

13871131 is a wasteful number, since it uses less digits than its factorization.

13871131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11780.

The product of its digits is 504, while the sum is 25.

The square root of 13871131 is about 3724.3967296731. The cubic root of 13871131 is about 240.2724394620.

Adding to 13871131 its reverse (13117831), we get a palindrome (26988962).

The spelling of 13871131 in words is "thirteen million, eight hundred seventy-one thousand, one hundred thirty-one".