13521100531 has 4 divisors (see below), whose sum is σ = 13604052232. Its totient is φ = 13438148832.

The previous prime is 13521100519. The next prime is 13521100559. The reversal of 13521100531 is 13500112531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13500112531 = 31 ⋅435487501.

It is a cyclic number.

It is not a de Polignac number, because 13521100531 - 2²⁹ = 12984229619 is a prime.

It is a super-2 number, since 2×13521100531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521100561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41475606 + ... + 41475931.

It is an arithmetic number, because the mean of its divisors is an integer number (3401013058).

Almost surely, 2^13521100531 is an apocalyptic number.

13521100531 is a deficient number, since it is larger than the sum of its proper divisors (82951701).

13521100531 is an equidigital number, since it uses as much as digits as its factorization.

13521100531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82951700.

The product of its (nonzero) digits is 450, while the sum is 22.

The spelling of 13521100531 in words is "thirteen billion, five hundred twenty-one million, one hundred thousand, five hundred thirty-one".