13423431133521 has 48 divisors (see below), whose sum is σ = 19597452264000. Its totient is φ = 8853547038336.

The previous prime is 13423431133499. The next prime is 13423431133571. The reversal of 13423431133521 is 12533113432431.

13423431133521 is a `hidden beast` number, since 1 + 3 + 4 + 2 + 3 + 4 + 311 + 335 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13423431133521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13423431133571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261389955 + ... + 261441303.

It is an arithmetic number, because the mean of its divisors is an integer number (408280255500).

Almost surely, 2^{13423431133521} is an apocalyptic number.

It is an amenable number.

13423431133521 is a deficient number, since it is larger than the sum of its proper divisors (6174021130479).

13423431133521 is a wasteful number, since it uses less digits than its factorization.

13423431133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52350 (or 52347 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 13423431133521 its reverse (12533113432431), we get a palindrome (25956544565952).

The spelling of 13423431133521 in words is "thirteen trillion, four hundred twenty-three billion, four hundred thirty-one million, one hundred thirty-three thousand, five hundred twenty-one".