3813535521 has 12 divisors (see below), whose sum is σ = 5522979280. Its totient is φ = 2535646680.

The previous prime is 3813535511. The next prime is 3813535567. The reversal of 3813535521 is 1255353183.

3813535521 is a `hidden beast` number, since 3 + 81 + 3 + 53 + 5 + 521 = 666.

It is not a de Polignac number, because 3813535521 - 2³⁰ = 2739793697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3813535511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555595 + ... + 562416.

Almost surely, 2^3813535521 is an apocalyptic number.

It is an amenable number.

3813535521 is a deficient number, since it is larger than the sum of its proper divisors (1709443759).

3813535521 is a wasteful number, since it uses less digits than its factorization.

3813535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118396 (or 1118393 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 3813535521 is about 61753.8300107775. The cubic root of 3813535521 is about 1562.3413670292.

The spelling of 3813535521 in words is "three billion, eight hundred thirteen million, five hundred thirty-five thousand, five hundred twenty-one".