4452212221 has 4 divisors (see below), whose sum is σ = 4686539200. Its totient is φ = 4217885244.

The previous prime is 4452212197. The next prime is 4452212239. The reversal of 4452212221 is 1222122544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4452212221 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 (4452212251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117163461 + ... + 117163498.

It is an arithmetic number, because the mean of its divisors is an integer number (1171634800).

Almost surely, 2^4452212221 is an apocalyptic number.

It is an amenable number.

4452212221 is a deficient number, since it is larger than the sum of its proper divisors (234326979).

4452212221 is a wasteful number, since it uses less digits than its factorization.

4452212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234326978.

The product of its digits is 2560, while the sum is 25.

The square root of 4452212221 is about 66724.8995578113. The cubic root of 4452212221 is about 1645.0986746179.

Adding to 4452212221 its reverse (1222122544), we get a palindrome (5674334765).

The spelling of 4452212221 in words is "four billion, four hundred fifty-two million, two hundred twelve thousand, two hundred twenty-one".