13533144421 has 16 divisors (see below), whose sum is σ = 14558837760. Its totient is φ = 12539182320.

The previous prime is 13533144419. The next prime is 13533144463. The reversal of 13533144421 is 12444133531.

13533144421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13533144421 - 2¹ = 13533144419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13533144481) 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, 1484086 + ... + 1493176.

It is an arithmetic number, because the mean of its divisors is an integer number (909927360).

Almost surely, 2^13533144421 is an apocalyptic number.

It is an amenable number.

13533144421 is a deficient number, since it is larger than the sum of its proper divisors (1025693339).

13533144421 is a wasteful number, since it uses less digits than its factorization.

13533144421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824.

The product of its digits is 17280, while the sum is 31.

Adding to 13533144421 its reverse (12444133531), we get a palindrome (25977277952).

The spelling of 13533144421 in words is "thirteen billion, five hundred thirty-three million, one hundred forty-four thousand, four hundred twenty-one".