4448440021 has 2 divisors, whose sum is σ = 4448440022. Its totient is φ = 4448440020.

The previous prime is 4448439979. The next prime is 4448440027. The reversal of 4448440021 is 1200448444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4330956100 + 117483921 = 65810^2 + 10839^2 .

It is a cyclic number.

It is not a de Polignac number, because 4448440021 - 2⁹ = 4448439509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4448440027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224220010 + 2224220011.

It is an arithmetic number, because the mean of its divisors is an integer number (2224220011).

Almost surely, 2^4448440021 is an apocalyptic number.

It is an amenable number.

4448440021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448440021 is an equidigital number, since it uses as much as digits as its factorization.

4448440021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16384, while the sum is 31.

The square root of 4448440021 is about 66696.6267587799. The cubic root of 4448440021 is about 1644.6339322723.

Adding to 4448440021 its reverse (1200448444), we get a palindrome (5648888465).

The spelling of 4448440021 in words is "four billion, four hundred forty-eight million, four hundred forty thousand, twenty-one".