13431140523 has 16 divisors (see below), whose sum is σ = 20149862400. Its totient is φ = 8840749320.

The previous prime is 13431140519. The next prime is 13431140587. The reversal of 13431140523 is 32504113431.

It is a happy number.

13431140523 is a `hidden beast` number, since 134 + 3 + 1 + 1 + 4 + 0 + 523 = 666.

It is not a de Polignac number, because 13431140523 - 2² = 13431140519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13431140423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3146283 + ... + 3150548.

It is an arithmetic number, because the mean of its divisors is an integer number (1259366400).

Almost surely, 2^13431140523 is an apocalyptic number.

13431140523 is a deficient number, since it is larger than the sum of its proper divisors (6718721877).

13431140523 is an equidigital number, since it uses as much as digits as its factorization.

13431140523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296919 (or 6296913 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13431140523 its reverse (32504113431), we get a palindrome (45935253954).

The spelling of 13431140523 in words is "thirteen billion, four hundred thirty-one million, one hundred forty thousand, five hundred twenty-three".