471715821 has 12 divisors (see below), whose sum is σ = 686271040. Its totient is φ = 312213960.

The previous prime is 471715801. The next prime is 471715859. The reversal of 471715821 is 128517174.

471715821 is a `hidden beast` number, since 4 + 7 + 1 + 71 + 582 + 1 = 666.

It is not a de Polignac number, because 471715821 - 2¹⁵ = 471683053 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 (471715801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187285 + ... + 189786.

Almost surely, 2^471715821 is an apocalyptic number.

It is an amenable number.

471715821 is a deficient number, since it is larger than the sum of its proper divisors (214555219).

471715821 is a wasteful number, since it uses less digits than its factorization.

471715821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377216 (or 377213 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 471715821 is about 21719.0197983242. The cubic root of 471715821 is about 778.4429936366.

The spelling of 471715821 in words is "four hundred seventy-one million, seven hundred fifteen thousand, eight hundred twenty-one".