13866538131 has 12 divisors (see below), whose sum is σ = 20041821280. Its totient is φ = 9238646160.

The previous prime is 13866538129. The next prime is 13866538139. The reversal of 13866538131 is 13183566831.

13866538131 is a `hidden beast` number, since 1 + 3 + 86 + 6 + 538 + 1 + 31 = 666.

It is not a de Polignac number, because 13866538131 - 2¹ = 13866538129 is a prime.

It is a super-2 number, since 2×13866538131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13866538139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460651 + ... + 489828.

Almost surely, 2^13866538131 is an apocalyptic number.

13866538131 is a deficient number, since it is larger than the sum of its proper divisors (6175283149).

13866538131 is a wasteful number, since it uses less digits than its factorization.

13866538131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952106 (or 952103 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 13866538131 in words is "thirteen billion, eight hundred sixty-six million, five hundred thirty-eight thousand, one hundred thirty-one".