13431231251 has 4 divisors (see below), whose sum is σ = 13432176912. Its totient is φ = 13430285592.

The previous prime is 13431231227. The next prime is 13431231263. The reversal of 13431231251 is 15213213431.

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 13431231251 - 2¹⁸ = 13430969107 is a prime.

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 13431231251.

It is not an unprimeable number, because it can be changed into a prime (13431231211) 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, 451196 + ... + 480041.

It is an arithmetic number, because the mean of its divisors is an integer number (3358044228).

Almost surely, 2^13431231251 is an apocalyptic number.

13431231251 is a deficient number, since it is larger than the sum of its proper divisors (945661).

13431231251 is an equidigital number, since it uses as much as digits as its factorization.

13431231251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945660.

The product of its digits is 2160, while the sum is 26.

Adding to 13431231251 its reverse (15213213431), we get a palindrome (28644444682).

The spelling of 13431231251 in words is "thirteen billion, four hundred thirty-one million, two hundred thirty-one thousand, two hundred fifty-one".