521248847 has 8 divisors (see below), whose sum is σ = 608388096. Its totient is φ = 437278392.

The previous prime is 521248841. The next prime is 521248877. The reversal of 521248847 is 748842125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521248847 - 2²⁰ = 520200271 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 (521248841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791843 + ... + 792500.

It is an arithmetic number, because the mean of its divisors is an integer number (76048512).

Almost surely, 2^521248847 is an apocalyptic number.

521248847 is a deficient number, since it is larger than the sum of its proper divisors (87139249).

521248847 is a wasteful number, since it uses less digits than its factorization.

521248847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584397.

The product of its digits is 143360, while the sum is 41.

The square root of 521248847 is about 22830.8748627818. The cubic root of 521248847 is about 804.7883897836.

The spelling of 521248847 in words is "five hundred twenty-one million, two hundred forty-eight thousand, eight hundred forty-seven".