13531154421 has 16 divisors (see below), whose sum is σ = 18223622144. Its totient is φ = 8930041344.

The previous prime is 13531154419. The next prime is 13531154467. The reversal of 13531154421 is 12445113531.

13531154421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13531154421 - 2¹ = 13531154419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531154321) 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, 135261 + ... + 212973.

It is an arithmetic number, because the mean of its divisors is an integer number (1138976384).

Almost surely, 2^13531154421 is an apocalyptic number.

It is an amenable number.

13531154421 is a deficient number, since it is larger than the sum of its proper divisors (4692467723).

13531154421 is a wasteful number, since it uses less digits than its factorization.

13531154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78300.

The product of its digits is 7200, while the sum is 30.

Adding to 13531154421 its reverse (12445113531), we get a palindrome (25976267952).

The spelling of 13531154421 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-four thousand, four hundred twenty-one".