520540224 has 56 divisors (see below), whose sum is σ = 1396166880. Its totient is φ = 171131904.

The previous prime is 520540217. The next prime is 520540247. The reversal of 520540224 is 422045025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 520540194 and 520540203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4554 + ... + 32585.

Almost surely, 2^520540224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520540224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698083440).

520540224 is an abundant number, since it is smaller than the sum of its proper divisors (875626656).

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

520540224 is a wasteful number, since it uses less digits than its factorization.

520540224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37227 (or 37217 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 520540224 is about 22815.3506218949. The cubic root of 520540224 is about 804.4235287429.

Adding to 520540224 its reverse (422045025), we get a palindrome (942585249).

The spelling of 520540224 in words is "five hundred twenty million, five hundred forty thousand, two hundred twenty-four".