4252450221 has 12 divisors (see below), whose sum is σ = 6205753372. Its totient is φ = 2805739776.

The previous prime is 4252450207. The next prime is 4252450231. The reversal of 4252450221 is 1220542524.

It can be written as a sum of positive squares in 2 ways, for example, as 2744292996 + 1508157225 = 52386^2 + 38835^2 .

It is not a de Polignac number, because 4252450221 - 2⁹ = 4252449709 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 (4252450231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2434666 + ... + 2436411.

Almost surely, 2^4252450221 is an apocalyptic number.

It is an amenable number.

4252450221 is a deficient number, since it is larger than the sum of its proper divisors (1953303151).

4252450221 is a wasteful number, since it uses less digits than its factorization.

4252450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871180 (or 4871177 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 4252450221 is about 65210.8136814746. The cubic root of 4252450221 is about 1620.1171257337.

Adding to 4252450221 its reverse (1220542524), we get a palindrome (5472992745).

The spelling of 4252450221 in words is "four billion, two hundred fifty-two million, four hundred fifty thousand, two hundred twenty-one".