5208647521 has 12 divisors (see below), whose sum is σ = 6609861360. Its totient is φ = 4058685960.

The previous prime is 5208647501. The next prime is 5208647537. The reversal of 5208647521 is 1257468025.

It is not a de Polignac number, because 5208647521 - 2⁹ = 5208647009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5208647501) 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, 4831231 + ... + 4832308.

It is an arithmetic number, because the mean of its divisors is an integer number (550821780).

Almost surely, 2^5208647521 is an apocalyptic number.

It is an amenable number.

5208647521 is a deficient number, since it is larger than the sum of its proper divisors (1401213839).

5208647521 is a wasteful number, since it uses less digits than its factorization.

5208647521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663564 (or 9663557 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 5208647521 is about 72170.9603718836. The cubic root of 5208647521 is about 1733.4380404655.

The spelling of 5208647521 in words is "five billion, two hundred eight million, six hundred forty-seven thousand, five hundred twenty-one".