13521444442 has 16 divisors (see below), whose sum is σ = 22135057632. Its totient is φ = 6143595120.

The previous prime is 13521444413. The next prime is 13521444457. The reversal of 13521444442 is 24444412531.

It is a junction number, because it is equal to n+sod(n) for n = 13521444398 and 13521444407.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 70293 + ... + 178840.

It is an arithmetic number, because the mean of its divisors is an integer number (1383441102).

Almost surely, 2^13521444442 is an apocalyptic number.

13521444442 is a deficient number, since it is larger than the sum of its proper divisors (8613613190).

13521444442 is a wasteful number, since it uses less digits than its factorization.

13521444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251613.

The product of its digits is 61440, while the sum is 34.

Adding to 13521444442 its reverse (24444412531), we get a palindrome (37965856973).

The spelling of 13521444442 in words is "thirteen billion, five hundred twenty-one million, four hundred forty-four thousand, four hundred forty-two".