521486671 has 16 divisors (see below), whose sum is σ = 553750560. Its totient is φ = 490250880.

The previous prime is 521486639. The next prime is 521486677. The reversal of 521486671 is 176684125.

It is a cyclic number.

It is not a de Polignac number, because 521486671 - 2⁵ = 521486639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521486677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674241 + ... + 675013.

It is an arithmetic number, because the mean of its divisors is an integer number (34609410).

Almost surely, 2^521486671 is an apocalyptic number.

521486671 is a deficient number, since it is larger than the sum of its proper divisors (32263889).

521486671 is a wasteful number, since it uses less digits than its factorization.

521486671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 80640, while the sum is 40.

The square root of 521486671 is about 22836.0826544309. The cubic root of 521486671 is about 804.9107682429.

The spelling of 521486671 in words is "five hundred twenty-one million, four hundred eighty-six thousand, six hundred seventy-one".