4425450221 has 12 divisors (see below), whose sum is σ = 4539951612. Its totient is φ = 4313768256.

The previous prime is 4425450193. The next prime is 4425450247. The reversal of 4425450221 is 1220545244.

4425450221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1252381321 + 3173068900 = 35389^2 + 56330^2 .

It is not a de Polignac number, because 4425450221 - 2³⁰ = 3351708397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4425450121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1027745 + ... + 1032041.

It is an arithmetic number, because the mean of its divisors is an integer number (378329301).

Almost surely, 2^4425450221 is an apocalyptic number.

It is an amenable number.

4425450221 is a deficient number, since it is larger than the sum of its proper divisors (114501391).

4425450221 is an equidigital number, since it uses as much as digits as its factorization.

4425450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940 (or 4897 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 4425450221 is about 66524.0574604406. The cubic root of 4425450221 is about 1641.7958491774.

Adding to 4425450221 its reverse (1220545244), we get a palindrome (5645995465).

The spelling of 4425450221 in words is "four billion, four hundred twenty-five million, four hundred fifty thousand, two hundred twenty-one".