2221024520 has 128 divisors (see below), whose sum is σ = 5932967040. Its totient is φ = 737648640.

The previous prime is 2221024501. The next prime is 2221024529. The reversal of 2221024520 is 254201222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2221024492 and 2221024501.

It is not an unprimeable number, because it can be changed into a prime (2221024529) 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, 552839 + ... + 556841.

It is an arithmetic number, because the mean of its divisors is an integer number (46351305).

Almost surely, 2^2221024520 is an apocalyptic number.

2221024520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221024520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2966483520).

2221024520 is an abundant number, since it is smaller than the sum of its proper divisors (3711942520).

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

2221024520 is a wasteful number, since it uses less digits than its factorization.

2221024520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2221024520 is about 47127.7468164987. The cubic root of 2221024520 is about 1304.7213959745.

Adding to 2221024520 its reverse (254201222), we get a palindrome (2475225742).

It can be divided in two parts, 222102 and 4520, that added together give a palindrome (226622).

The spelling of 2221024520 in words is "two billion, two hundred twenty-one million, twenty-four thousand, five hundred twenty".