520202220 has 24 divisors (see below), whose sum is σ = 1456566384. Its totient is φ = 138720576.

The previous prime is 520202209. The next prime is 520202231. The reversal of 520202220 is 22202025.

It is an interprime number because it is at equal distance from previous prime (520202209) and next prime (520202231).

It is a super-2 number, since 2×520202220² = 541220699385856800, 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 520202220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4334959 + ... + 4335078.

It is an arithmetic number, because the mean of its divisors is an integer number (60690266).

Almost surely, 2^520202220 is an apocalyptic number.

It is an amenable number.

520202220 is an abundant number, since it is smaller than the sum of its proper divisors (936364164).

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

520202220 is a wasteful number, since it uses less digits than its factorization.

520202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670049 (or 8670047 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 520202220 is about 22807.9420378078. The cubic root of 520202220 is about 804.2493781010.

Adding to 520202220 its reverse (22202025), we get a palindrome (542404245).

The spelling of 520202220 in words is "five hundred twenty million, two hundred two thousand, two hundred twenty".