13231424431 has 4 divisors (see below), whose sum is σ = 13232313000. Its totient is φ = 13230535864.

The previous prime is 13231424369. The next prime is 13231424447. The reversal of 13231424431 is 13442413231.

It is a happy number.

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 13231424431 - 2¹⁹ = 13230900143 is a prime.

It is a super-2 number, since 2×13231424431² (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 13231424431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231424491) 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, 421561 + ... + 451858.

It is an arithmetic number, because the mean of its divisors is an integer number (3308078250).

Almost surely, 2^13231424431 is an apocalyptic number.

13231424431 is a deficient number, since it is larger than the sum of its proper divisors (888569).

13231424431 is an equidigital number, since it uses as much as digits as its factorization.

13231424431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888568.

The product of its digits is 6912, while the sum is 28.

Adding to 13231424431 its reverse (13442413231), we get a palindrome (26673837662).

The spelling of 13231424431 in words is "thirteen billion, two hundred thirty-one million, four hundred twenty-four thousand, four hundred thirty-one".