4044242221 has 4 divisors (see below), whose sum is σ = 4120548732. Its totient is φ = 3967935712.

The previous prime is 4044242197. The next prime is 4044242263. The reversal of 4044242221 is 1222424404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2331441225 + 1712800996 = 48285^2 + 41386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4044242221 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 (4044242021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38153176 + ... + 38153281.

It is an arithmetic number, because the mean of its divisors is an integer number (1030137183).

Almost surely, 2^4044242221 is an apocalyptic number.

It is an amenable number.

4044242221 is a deficient number, since it is larger than the sum of its proper divisors (76306511).

4044242221 is an equidigital number, since it uses as much as digits as its factorization.

4044242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76306510.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 4044242221 is about 63594.3568329769. The cubic root of 4044242221 is about 1593.2321185869.

Adding to 4044242221 its reverse (1222424404), we get a palindrome (5266666625).

The spelling of 4044242221 in words is "four billion, forty-four million, two hundred forty-two thousand, two hundred twenty-one".