520204471997 has 48 divisors (see below), whose sum is σ = 635500521600. Its totient is φ = 416996591616.

The previous prime is 520204471967. The next prime is 520204472023. The reversal of 520204471997 is 799174402025.

It is a happy number.

It is not a de Polignac number, because 520204471997 - 2²⁶ = 520137363133 is a prime.

It is a super-2 number, since 2×520204471997² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520204471967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29804129 + ... + 29821577.

It is an arithmetic number, because the mean of its divisors is an integer number (13239594200).

Almost surely, 2^520204471997 is an apocalyptic number.

It is an amenable number.

520204471997 is a deficient number, since it is larger than the sum of its proper divisors (115296049603).

520204471997 is a wasteful number, since it uses less digits than its factorization.

520204471997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682 (or 17659 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 520204471997 in words is "five hundred twenty billion, two hundred four million, four hundred seventy-one thousand, nine hundred ninety-seven".