44216221 has 16 divisors (see below), whose sum is σ = 52579840. Its totient is φ = 36391680.

The previous prime is 44216219. The next prime is 44216231. The reversal of 44216221 is 12261244.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 44216221 - 2¹ = 44216219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44216192 and 44216201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44216231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19381 + ... + 21541.

It is an arithmetic number, because the mean of its divisors is an integer number (3286240).

Almost surely, 2^44216221 is an apocalyptic number.

It is an amenable number.

44216221 is a deficient number, since it is larger than the sum of its proper divisors (8363619).

44216221 is a wasteful number, since it uses less digits than its factorization.

44216221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its digits is 768, while the sum is 22.

The square root of 44216221 is about 6649.5278779775. The cubic root of 44216221 is about 353.6121732883.

Adding to 44216221 its reverse (12261244), we get a palindrome (56477465).

The spelling of 44216221 in words is "forty-four million, two hundred sixteen thousand, two hundred twenty-one".