521874307317317 has 4 divisors (see below), whose sum is σ = 521874521582400. Its totient is φ = 521874093052236.

The previous prime is 521874307317283. The next prime is 521874307317373. The reversal of 521874307317317 is 713713703478125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521874307317317 - 2²⁴ = 521874290540101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521874307317917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103436567 + ... + 108364532.

It is an arithmetic number, because the mean of its divisors is an integer number (130468630395600).

Almost surely, 2^{521874307317317} is an apocalyptic number.

It is an amenable number.

521874307317317 is a deficient number, since it is larger than the sum of its proper divisors (214265083).

521874307317317 is a wasteful number, since it uses less digits than its factorization.

521874307317317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214265082.

The product of its (nonzero) digits is 20744640, while the sum is 59.

The spelling of 521874307317317 in words is "five hundred twenty-one trillion, eight hundred seventy-four billion, three hundred seven million, three hundred seventeen thousand, three hundred seventeen".