8701317521 has 16 divisors (see below), whose sum is σ = 9416757504. Its totient is φ = 7992566784.

The previous prime is 8701317511. The next prime is 8701317601. The reversal of 8701317521 is 1257131078.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8701317521 - 2¹⁰ = 8701316497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8701317511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2601176 + ... + 2604518.

It is an arithmetic number, because the mean of its divisors is an integer number (588547344).

Almost surely, 2^8701317521 is an apocalyptic number.

It is an amenable number.

8701317521 is a deficient number, since it is larger than the sum of its proper divisors (715439983).

8701317521 is a wasteful number, since it uses less digits than its factorization.

8701317521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 8701317521 is about 93280.8529174128. The cubic root of 8701317521 is about 2056.8139331405.

Adding to 8701317521 its reverse (1257131078), we get a palindrome (9958448599).

The spelling of 8701317521 in words is "eight billion, seven hundred one million, three hundred seventeen thousand, five hundred twenty-one".