13530525521 has 8 divisors (see below), whose sum is σ = 13567450080. Its totient is φ = 13493630592.

The previous prime is 13530525509. The next prime is 13530525557. The reversal of 13530525521 is 12552503531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13530525521 - 2²⁶ = 13463416657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13530525571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142810 + ... + 1154588.

It is an arithmetic number, because the mean of its divisors is an integer number (1695931260).

Almost surely, 2^13530525521 is an apocalyptic number.

It is an amenable number.

13530525521 is a deficient number, since it is larger than the sum of its proper divisors (36924559).

13530525521 is a wasteful number, since it uses less digits than its factorization.

13530525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14815.

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 13530525521 in words is "thirteen billion, five hundred thirty million, five hundred twenty-five thousand, five hundred twenty-one".