520003220 has 24 divisors (see below), whose sum is σ = 1191280608. Its totient is φ = 189092000.

The previous prime is 520003213. The next prime is 520003261. The reversal of 520003220 is 22300025.

It is a junction number, because it is equal to n+sod(n) for n = 520003195 and 520003204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181606 + ... + 1182045.

It is an arithmetic number, because the mean of its divisors is an integer number (49636692).

Almost surely, 2^520003220 is an apocalyptic number.

It is an amenable number.

520003220 is an abundant number, since it is smaller than the sum of its proper divisors (671277388).

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

520003220 is a wasteful number, since it uses less digits than its factorization.

520003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363671 (or 2363669 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 520003220 is about 22803.5791050440. The cubic root of 520003220 is about 804.1468115525.

Adding to 520003220 its reverse (22300025), we get a palindrome (542303245).

The spelling of 520003220 in words is "five hundred twenty million, three thousand, two hundred twenty".