471808521 has 12 divisors (see below), whose sum is σ = 682731972. Its totient is φ = 313970976.

The previous prime is 471808507. The next prime is 471808529. The reversal of 471808521 is 125808174.

It can be written as a sum of positive squares in 2 ways, for example, as 135489600 + 336318921 = 11640^2 + 18339^2 .

It is not a de Polignac number, because 471808521 - 2¹⁵ = 471775753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (471808529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42046 + ... + 52071.

It is an arithmetic number, because the mean of its divisors is an integer number (56894331).

Almost surely, 2^471808521 is an apocalyptic number.

It is an amenable number.

471808521 is a deficient number, since it is larger than the sum of its proper divisors (210923451).

471808521 is a wasteful number, since it uses less digits than its factorization.

471808521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94680 (or 94677 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 471808521 is about 21721.1537676984. The cubic root of 471808521 is about 778.4939826261.

The spelling of 471808521 in words is "four hundred seventy-one million, eight hundred eight thousand, five hundred twenty-one".