5221220220 has 144 divisors (see below), whose sum is σ = 16509930528. Its totient is φ = 1334361600.

The previous prime is 5221220203. The next prime is 5221220231. The reversal of 5221220220 is 220221225.

5221220220 is a `hidden beast` number, since 5 + 221 + 220 + 220 = 666.

It is a super-2 number, since 2×5221220220² = 54522281171473696800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 5221220193 and 5221220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440370 + ... + 452070.

Almost surely, 2^5221220220 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 5221220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8254965264).

5221220220 is an abundant number, since it is smaller than the sum of its proper divisors (11288710308).

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

5221220220 is a wasteful number, since it uses less digits than its factorization.

5221220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820 (or 11815 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 5221220220 is about 72258.0114589379. The cubic root of 5221220220 is about 1734.8316512872.

Adding to 5221220220 its reverse (220221225), we get a palindrome (5441441445).

The spelling of 5221220220 in words is "five billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty".