22220515220 has 12 divisors (see below), whose sum is σ = 46663082004. Its totient is φ = 8888206080.

The previous prime is 22220515189. The next prime is 22220515223. The reversal of 22220515220 is 2251502222.

It can be written as a sum of positive squares in 2 ways, for example, as 4884052996 + 17336462224 = 69886^2 + 131668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220515223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555512861 + ... + 555512900.

It is an arithmetic number, because the mean of its divisors is an integer number (3888590167).

Almost surely, 2^22220515220 is an apocalyptic number.

22220515220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220515220 is an abundant number, since it is smaller than the sum of its proper divisors (24442566784).

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

22220515220 is a wasteful number, since it uses less digits than its factorization.

22220515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111025770 (or 1111025768 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The spelling of 22220515220 in words is "twenty-two billion, two hundred twenty million, five hundred fifteen thousand, two hundred twenty".