13531103431 has 4 divisors (see below), whose sum is σ = 13531723000. Its totient is φ = 13530483864.

The previous prime is 13531103429. The next prime is 13531103447. The reversal of 13531103431 is 13430113531.

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 13531103431 - 2¹ = 13531103429 is a prime.

It is a super-2 number, since 2×13531103431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13531103396 and 13531103405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531103461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275781 + ... + 321118.

It is an arithmetic number, because the mean of its divisors is an integer number (3382930750).

Almost surely, 2^13531103431 is an apocalyptic number.

13531103431 is a deficient number, since it is larger than the sum of its proper divisors (619569).

13531103431 is an equidigital number, since it uses as much as digits as its factorization.

13531103431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619568.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 13531103431 its reverse (13430113531), we get a palindrome (26961216962).

The spelling of 13531103431 in words is "thirteen billion, five hundred thirty-one million, one hundred three thousand, four hundred thirty-one".