13531321224 has 48 divisors (see below), whose sum is σ = 38803057020. Its totient is φ = 4245120000.

The previous prime is 13531321169. The next prime is 13531321247. The reversal of 13531321224 is 42212313531.

13531321224 is a `hidden beast` number, since 1 + 3 + 531 + 3 + 2 + 122 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13528016100 + 3305124 = 116310^2 + 1818^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5526277 + ... + 5528724.

Almost surely, 2^13531321224 is an apocalyptic number.

It is an amenable number.

13531321224 is an abundant number, since it is smaller than the sum of its proper divisors (25271735796).

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

13531321224 is a wasteful number, since it uses less digits than its factorization.

13531321224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055030 (or 11055023 counting only the distinct ones).

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

Adding to 13531321224 its reverse (42212313531), we get a palindrome (55743634755).

The spelling of 13531321224 in words is "thirteen billion, five hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-four".