44040221 has 4 divisors (see below), whose sum is σ = 44053500. Its totient is φ = 44026944.

The previous prime is 44040187. The next prime is 44040253. The reversal of 44040221 is 12204044.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 35402500 + 8637721 = 5950^2 + 2939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44040221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44040121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035 + ... + 9863.

It is an arithmetic number, because the mean of its divisors is an integer number (11013375).

Almost surely, 2^44040221 is an apocalyptic number.

It is an amenable number.

44040221 is a deficient number, since it is larger than the sum of its proper divisors (13279).

44040221 is an equidigital number, since it uses as much as digits as its factorization.

44040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13278.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 44040221 is about 6636.2806601288. The cubic root of 44040221 is about 353.1423720903.

Adding to 44040221 its reverse (12204044), we get a palindrome (56244265).

The spelling of 44040221 in words is "forty-four million, forty thousand, two hundred twenty-one".