13533042521 has 8 divisors (see below), whose sum is σ = 13589484360. Its totient is φ = 13476630528.

The previous prime is 13533042499. The next prime is 13533042527. The reversal of 13533042521 is 12524033531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12153960025 + 1379082496 = 110245^2 + 37136^2 .

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 13533042521 - 2¹⁰ = 13533041497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13533042527) 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, 1608995 + ... + 1617383.

It is an arithmetic number, because the mean of its divisors is an integer number (1698685545).

Almost surely, 2^13533042521 is an apocalyptic number.

It is an amenable number.

13533042521 is a deficient number, since it is larger than the sum of its proper divisors (56441839).

13533042521 is an equidigital number, since it uses as much as digits as its factorization.

13533042521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14923.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 13533042521 in words is "thirteen billion, five hundred thirty-three million, forty-two thousand, five hundred twenty-one".