520043100 has 72 divisors (see below), whose sum is σ = 1507820160. Its totient is φ = 138386880.

The previous prime is 520043099. The next prime is 520043101. The reversal of 520043100 is 1340025.

It is an interprime number because it is at equal distance from previous prime (520043099) and next prime (520043101).

It is a super-2 number, since 2×520043100² = 540889651715220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 520043100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520043101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167361 + ... + 170439.

Almost surely, 2^520043100 is an apocalyptic number.

520043100 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 520043100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753910080).

520043100 is an abundant number, since it is smaller than the sum of its proper divisors (987777060).

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

520043100 is a wasteful number, since it uses less digits than its factorization.

520043100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659 (or 3652 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 520043100 is about 22804.4535124173. The cubic root of 520043100 is about 804.1673681912.

Adding to 520043100 its reverse (1340025), we get a palindrome (521383125).

The spelling of 520043100 in words is "five hundred twenty million, forty-three thousand, one hundred".