520117500 has 120 divisors (see below), whose sum is σ = 1733345152. Its totient is φ = 118872000.

The previous prime is 520117489. The next prime is 520117501. The reversal of 520117500 is 5711025.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520117501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47547 + ... + 57453.

Almost surely, 2^520117500 is an apocalyptic number.

520117500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520117500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866672576).

520117500 is an abundant number, since it is smaller than the sum of its proper divisors (1213227652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520117500 is a wasteful number, since it uses less digits than its factorization.

520117500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9941 (or 9924 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 520117500 is about 22806.0847143915. The cubic root of 520117500 is about 804.2057157815.

Adding to 520117500 its reverse (5711025), we get a palindrome (525828525).

The spelling of 520117500 in words is "five hundred twenty million, one hundred seventeen thousand, five hundred".