44400221 has 4 divisors (see below), whose sum is σ = 44424252. Its totient is φ = 44376192.

The previous prime is 44400217. The next prime is 44400233. The reversal of 44400221 is 12200444.

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 34351321 + 10048900 = 5861^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 44400221 - 2² = 44400217 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 44400221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44400211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8990 + ... + 13023.

It is an arithmetic number, because the mean of its divisors is an integer number (11106063).

Almost surely, 2^44400221 is an apocalyptic number.

It is an amenable number.

44400221 is a deficient number, since it is larger than the sum of its proper divisors (24031).

44400221 is a wasteful number, since it uses less digits than its factorization.

44400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24030.

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

The square root of 44400221 is about 6663.3490828562. The cubic root of 44400221 is about 354.1019980165.

Adding to 44400221 its reverse (12200444), we get a palindrome (56600665).

The spelling of 44400221 in words is "forty-four million, four hundred thousand, two hundred twenty-one".