13431434144 has 12 divisors (see below), whose sum is σ = 26443136034. Its totient is φ = 6715717056.

The previous prime is 13431434143. The next prime is 13431434147. The reversal of 13431434144 is 44143413431.

It can be written as a sum of positive squares in only one way, i.e., 11798304400 + 1633129744 = 108620^2 + 40412^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 419732317 = 13431434144 / (1 + 3 + 4 + 3 + 1 + 4 + 3 + 4 + 1 + 4 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 13431434144.

It is not an unprimeable number, because it can be changed into a prime (13431434143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209866127 + ... + 209866190.

Almost surely, 2^13431434144 is an apocalyptic number.

It is an amenable number.

13431434144 is a deficient number, since it is larger than the sum of its proper divisors (13011701890).

13431434144 is an equidigital number, since it uses as much as digits as its factorization.

13431434144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419732327 (or 419732319 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 13431434144 its reverse (44143413431), we get a palindrome (57574847575).

The spelling of 13431434144 in words is "thirteen billion, four hundred thirty-one million, four hundred thirty-four thousand, one hundred forty-four".