3563731521 has 48 divisors (see below), whose sum is σ = 6067047168. Its totient is φ = 1973376000.

The previous prime is 3563731517. The next prime is 3563731529. The reversal of 3563731521 is 1251373653.

3563731521 is a `hidden beast` number, since 3 + 5 + 63 + 73 + 1 + 521 = 666.

It is not a de Polignac number, because 3563731521 - 2² = 3563731517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3563731529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385465 + ... + 394601.

It is an arithmetic number, because the mean of its divisors is an integer number (126396816).

Almost surely, 2^3563731521 is an apocalyptic number.

It is an amenable number.

3563731521 is a deficient number, since it is larger than the sum of its proper divisors (2503315647).

3563731521 is a wasteful number, since it uses less digits than its factorization.

3563731521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342 (or 9339 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 3563731521 is about 59696.9975878184. The cubic root of 3563731521 is about 1527.4546541737.

The spelling of 3563731521 in words is "three billion, five hundred sixty-three million, seven hundred thirty-one thousand, five hundred twenty-one".