44224420221 has 12 divisors (see below), whose sum is σ = 63969825660. Its totient is φ = 29441358720.

The previous prime is 44224420199. The next prime is 44224420223. The reversal of 44224420221 is 12202442244.

It can be written as a sum of positive squares in 2 ways, for example, as 25252388100 + 18972032121 = 158910^2 + 137739^2 .

It is not a de Polignac number, because 44224420221 - 2⁹ = 44224419709 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 (44224420223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3458940 + ... + 3471701.

It is an arithmetic number, because the mean of its divisors is an integer number (5330818805).

Almost surely, 2^44224420221 is an apocalyptic number.

It is an amenable number.

44224420221 is a deficient number, since it is larger than the sum of its proper divisors (19745405439).

44224420221 is a wasteful number, since it uses less digits than its factorization.

44224420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931356 (or 6931353 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 44224420221 its reverse (12202442244), we get a palindrome (56426862465).

The spelling of 44224420221 in words is "forty-four billion, two hundred twenty-four million, four hundred twenty thousand, two hundred twenty-one".