520245220 has 96 divisors (see below), whose sum is σ = 1274144256. Its totient is φ = 176332800.

The previous prime is 520245179. The next prime is 520245221. The reversal of 520245220 is 22542025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 520245191 and 520245200.

It is not an unprimeable number, because it can be changed into a prime (520245221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422005 + ... + 423235.

It is an arithmetic number, because the mean of its divisors is an integer number (13272336).

Almost surely, 2^520245220 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 520245220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637072128).

520245220 is an abundant number, since it is smaller than the sum of its proper divisors (753899036).

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

520245220 is a wasteful number, since it uses less digits than its factorization.

520245220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 520245220 is about 22808.8846724253. The cubic root of 520245220 is about 804.2715372852.

Adding to 520245220 its reverse (22542025), we get a palindrome (542787245).

The spelling of 520245220 in words is "five hundred twenty million, two hundred forty-five thousand, two hundred twenty".