13231120440431 has 8 divisors (see below), whose sum is σ = 13449970435440. Its totient is φ = 13014042510528.

The previous prime is 13231120440367. The next prime is 13231120440463. The reversal of 13231120440431 is 13404402113231.

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 13231120440431 - 2⁶ = 13231120440367 is a prime.

It is a super-2 number, since 2×13231120440431² (a number of 27 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 = 13231120440394 and 13231120440403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231120440481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443001221 + ... + 443031086.

It is an arithmetic number, because the mean of its divisors is an integer number (1681246304430).

Almost surely, 2^{13231120440431} is an apocalyptic number.

13231120440431 is a deficient number, since it is larger than the sum of its proper divisors (218849995009).

13231120440431 is a wasteful number, since it uses less digits than its factorization.

13231120440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886032553.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 13231120440431 its reverse (13404402113231), we get a palindrome (26635522553662).

The spelling of 13231120440431 in words is "thirteen trillion, two hundred thirty-one billion, one hundred twenty million, four hundred forty thousand, four hundred thirty-one".