520471647 has 12 divisors (see below), whose sum is σ = 758819880. Its totient is φ = 343737648.

The previous prime is 520471619. The next prime is 520471649. The reversal of 520471647 is 746174025.

520471647 is a `hidden beast` number, since 5 + 2 + 0 + 4 + 7 + 1 + 647 = 666.

It is not a de Polignac number, because 520471647 - 2⁶ = 520471583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520471649) 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, 269272 + ... + 271197.

It is an arithmetic number, because the mean of its divisors is an integer number (63234990).

Almost surely, 2^520471647 is an apocalyptic number.

520471647 is a deficient number, since it is larger than the sum of its proper divisors (238348233).

520471647 is a wasteful number, since it uses less digits than its factorization.

520471647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540582 (or 540579 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 520471647 is about 22813.8477026564. The cubic root of 520471647 is about 804.3882017419.

The spelling of 520471647 in words is "five hundred twenty million, four hundred seventy-one thousand, six hundred forty-seven".