44223021 has 12 divisors (see below), whose sum is σ = 64043772. Its totient is φ = 29405376.

The previous prime is 44223017. The next prime is 44223031. The reversal of 44223021 is 12032244.

It can be written as a sum of positive squares in 2 ways, for example, as 16281225 + 27941796 = 4035^2 + 5286^2 .

It is not a de Polignac number, because 44223021 - 2² = 44223017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44222985 and 44223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44223031) 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, 2616 + ... + 9761.

It is an arithmetic number, because the mean of its divisors is an integer number (5336981).

Almost surely, 2^44223021 is an apocalyptic number.

It is an amenable number.

44223021 is a deficient number, since it is larger than the sum of its proper divisors (19820751).

44223021 is a wasteful number, since it uses less digits than its factorization.

44223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780 (or 12777 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 44223021 is about 6650.0391728170. The cubic root of 44223021 is about 353.6302996641.

Adding to 44223021 its reverse (12032244), we get a palindrome (56255265).

It can be divided in two parts, 4 and 4223021, that added together give a square (4223025 = 2055²).

The spelling of 44223021 in words is "forty-four million, two hundred twenty-three thousand, twenty-one".