2221722624 has 264 divisors, whose sum is σ = 6708264640. Its totient is φ = 652861440.

The previous prime is 2221722623. The next prime is 2221722689. The reversal of 2221722624 is 4262271222.

It is a tau number, because it is divible by the number of its divisors (264).

It is a junction number, because it is equal to n+sod(n) for n = 2221722591 and 2221722600.

It is not an unprimeable number, because it can be changed into a prime (2221722623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15983547 + ... + 15983685.

Almost surely, 2^2221722624 is an apocalyptic number.

2221722624 is a gapful number since it is divisible by the number (24) 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 2221722624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3354132320).

2221722624 is an abundant number, since it is smaller than the sum of its proper divisors (4486542016).

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

2221722624 is a wasteful number, since it uses less digits than its factorization.

2221722624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 198 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 2221722624 is about 47135.1527418762. The cubic root of 2221722624 is about 1304.8580800144.

Adding to 2221722624 its reverse (4262271222), we get a palindrome (6483993846).

The spelling of 2221722624 in words is "two billion, two hundred twenty-one million, seven hundred twenty-two thousand, six hundred twenty-four".