13531131431 has 8 divisors (see below), whose sum is σ = 13999039680. Its totient is φ = 13063311072.

The previous prime is 13531131421. The next prime is 13531131433. The reversal of 13531131431 is 13413113531.

It is a happy number.

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 13531131431 - 2¹⁰ = 13531130407 is a prime.

It is a super-2 number, since 2×13531131431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13531131431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531131433) 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, 509426 + ... + 535328.

It is an arithmetic number, because the mean of its divisors is an integer number (1749879960).

Almost surely, 2^13531131431 is an apocalyptic number.

13531131431 is a deficient number, since it is larger than the sum of its proper divisors (467908249).

13531131431 is a wasteful number, since it uses less digits than its factorization.

13531131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43945.

The product of its digits is 1620, while the sum is 26.

Adding to 13531131431 its reverse (13413113531), we get a palindrome (26944244962).

The spelling of 13531131431 in words is "thirteen billion, five hundred thirty-one million, one hundred thirty-one thousand, four hundred thirty-one".