13081431 has 12 divisors (see below), whose sum is σ = 19172216. Its totient is φ = 7927920.

The previous prime is 13081427. The next prime is 13081433. The reversal of 13081431 is 13418031.

It is not a de Polignac number, because 13081431 - 2² = 13081427 is a prime.

It is a super-2 number, since 2×13081431² = 342247674015522, 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 = 13081398 and 13081407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081433) 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, 17656 + ... + 18381.

Almost surely, 2^13081431 is an apocalyptic number.

13081431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13081431 is a deficient number, since it is larger than the sum of its proper divisors (6090785).

13081431 is a wasteful number, since it uses less digits than its factorization.

13081431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36062 (or 36051 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13081431 is about 3616.8260947964. The cubic root of 13081431 is about 235.6233998817.

Adding to 13081431 its reverse (13418031), we get a palindrome (26499462).

The spelling of 13081431 in words is "thirteen million, eighty-one thousand, four hundred thirty-one".