317241563521 has 2 divisors, whose sum is σ = 317241563522. Its totient is φ = 317241563520.

The previous prime is 317241563519. The next prime is 317241563549. The reversal of 317241563521 is 125365142713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284286244225 + 32955319296 = 533185^2 + 181536^2 .

It is an emirp because it is prime and its reverse (125365142713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317241563521 - 2¹ = 317241563519 is a prime.

Together with 317241563519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (317241563591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158620781760 + 158620781761.

It is an arithmetic number, because the mean of its divisors is an integer number (158620781761).

Almost surely, 2^317241563521 is an apocalyptic number.

It is an amenable number.

317241563521 is a deficient number, since it is larger than the sum of its proper divisors (1).

317241563521 is an equidigital number, since it uses as much as digits as its factorization.

317241563521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The spelling of 317241563521 in words is "three hundred seventeen billion, two hundred forty-one million, five hundred sixty-three thousand, five hundred twenty-one".