520220 has 36 divisors (see below), whose sum is σ = 1181880. Its totient is φ = 191808.

The previous prime is 520213. The next prime is 520241. The reversal of 520220 is 22025.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

520220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14042 + ... + 14078.

It is an arithmetic number, because the mean of its divisors is an integer number (32830).

2⁵²⁰²²⁰ 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 520220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590940).

520220 is an abundant number, since it is smaller than the sum of its proper divisors (661660).

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

520220 is a wasteful number, since it uses less digits than its factorization.

520220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 520220 is about 721.2627815159. The cubic root of 520220 is about 80.4258540814.

Adding to 520220 its reverse (22025), we get a palindrome (542245).

The spelling of 520220 in words is "five hundred twenty thousand, two hundred twenty".