13531321242 has 32 divisors (see below), whose sum is σ = 30074260800. Its totient is φ = 4509741744.

The previous prime is 13531321169. The next prime is 13531321247. The reversal of 13531321242 is 24212313531.

13531321242 is a `hidden beast` number, since 1 + 3 + 531 + 3 + 2 + 124 + 2 = 666.

13531321242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13531321247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426348 + ... + 456984.

It is an arithmetic number, because the mean of its divisors is an integer number (939820650).

Almost surely, 2^13531321242 is an apocalyptic number.

13531321242 is an abundant number, since it is smaller than the sum of its proper divisors (16542939558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531321242 is a wasteful number, since it uses less digits than its factorization.

13531321242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38827 (or 38821 counting only the distinct ones).

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

Adding to 13531321242 its reverse (24212313531), we get a palindrome (37743634773).

The spelling of 13531321242 in words is "thirteen billion, five hundred thirty-one million, three hundred twenty-one thousand, two hundred forty-two".