2221525530 has 48 divisors (see below), whose sum is σ = 6601106304. Its totient is φ = 507777120.

The previous prime is 2221525517. The next prime is 2221525531. The reversal of 2221525530 is 355251222.

It is a junction number, because it is equal to n+sod(n) for n = 2221525494 and 2221525503.

It is not an unprimeable number, because it can be changed into a prime (2221525531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1762486 + ... + 1763745.

It is an arithmetic number, because the mean of its divisors is an integer number (137523048).

Almost surely, 2^2221525530 is an apocalyptic number.

2221525530 is an abundant number, since it is smaller than the sum of its proper divisors (4379580774).

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

2221525530 is a wasteful number, since it uses less digits than its factorization.

2221525530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526251 (or 3526248 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2221525530 is about 47133.0619629152. The cubic root of 2221525530 is about 1304.8194932438.

Adding to 2221525530 its reverse (355251222), we get a palindrome (2576776752).

The spelling of 2221525530 in words is "two billion, two hundred twenty-one million, five hundred twenty-five thousand, five hundred thirty".