4144443021 has 6 divisors (see below), whose sum is σ = 5986417710. Its totient is φ = 2762962008.

The previous prime is 4144443013. The next prime is 4144443047. The reversal of 4144443021 is 1203444414.

It can be written as a sum of positive squares in only one way, i.e., 3808124100 + 336318921 = 61710^2 + 18339^2 .

It is not a de Polignac number, because 4144443021 - 2³ = 4144443013 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 (4144445021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230246826 + ... + 230246843.

It is an arithmetic number, because the mean of its divisors is an integer number (997736285).

Almost surely, 2^4144443021 is an apocalyptic number.

It is an amenable number.

4144443021 is a deficient number, since it is larger than the sum of its proper divisors (1841974689).

4144443021 is a wasteful number, since it uses less digits than its factorization.

4144443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460493675 (or 460493672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 4144443021 is about 64377.3486639517. The cubic root of 4144443021 is about 1606.2829803299.

Adding to 4144443021 its reverse (1203444414), we get a palindrome (5347887435).

The spelling of 4144443021 in words is "four billion, one hundred forty-four million, four hundred forty-three thousand, twenty-one".