4452412221 has 24 divisors (see below), whose sum is σ = 6463056600. Its totient is φ = 2953641600.

The previous prime is 4452412219. The next prime is 4452412249. The reversal of 4452412221 is 1222142544.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169364196 + 4283048025 = 13014^2 + 65445^2 .

It is not a de Polignac number, because 4452412221 - 2¹ = 4452412219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4452412121) 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, 1745455 + ... + 1748003.

It is an arithmetic number, because the mean of its divisors is an integer number (269294025).

Almost surely, 2^4452412221 is an apocalyptic number.

It is an amenable number.

4452412221 is a deficient number, since it is larger than the sum of its proper divisors (2010644379).

4452412221 is a wasteful number, since it uses less digits than its factorization.

4452412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437 (or 3434 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 4452412221 is about 66726.3982318842. The cubic root of 4452412221 is about 1645.1233076761.

Adding to 4452412221 its reverse (1222142544), we get a palindrome (5674554765).

The spelling of 4452412221 in words is "four billion, four hundred fifty-two million, four hundred twelve thousand, two hundred twenty-one".