13531325521 has 16 divisors (see below), whose sum is σ = 15890356224. Its totient is φ = 11281821264.

The previous prime is 13531325503. The next prime is 13531325567. The reversal of 13531325521 is 12552313531.

It is not a de Polignac number, because 13531325521 - 2⁹ = 13531325009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13531325581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72535 + ... + 179788.

It is an arithmetic number, because the mean of its divisors is an integer number (993147264).

Almost surely, 2^13531325521 is an apocalyptic number.

It is an amenable number.

13531325521 is a deficient number, since it is larger than the sum of its proper divisors (2359030703).

13531325521 is a wasteful number, since it uses less digits than its factorization.

13531325521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252540.

The product of its digits is 13500, while the sum is 31.

The spelling of 13531325521 in words is "thirteen billion, five hundred thirty-one million, three hundred twenty-five thousand, five hundred twenty-one".