44223121 has 4 divisors (see below), whose sum is σ = 44720100. Its totient is φ = 43726144.

The previous prime is 44223079. The next prime is 44223161. The reversal of 44223121 is 12132244.

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 26884225 + 17338896 = 5185^2 + 4164^2 .

It is a cyclic number.

It is not a de Polignac number, because 44223121 - 2⁹ = 44222609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44223161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248356 + ... + 248533.

It is an arithmetic number, because the mean of its divisors is an integer number (11180025).

Almost surely, 2^44223121 is an apocalyptic number.

It is an amenable number.

44223121 is a deficient number, since it is larger than the sum of its proper divisors (496979).

44223121 is an equidigital number, since it uses as much as digits as its factorization.

44223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496978.

The product of its digits is 384, while the sum is 19.

The square root of 44223121 is about 6650.0466915654. The cubic root of 44223121 is about 353.6305662146.

Adding to 44223121 its reverse (12132244), we get a palindrome (56355365).

It can be divided in two parts, 44223 and 121, that added together give a palindrome (44344).

The spelling of 44223121 in words is "forty-four million, two hundred twenty-three thousand, one hundred twenty-one".