44143221 has 4 divisors (see below), whose sum is σ = 58857632. Its totient is φ = 29428812.

The previous prime is 44143217. The next prime is 44143243. The reversal of 44143221 is 12234144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 44143221 - 2² = 44143217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44143291) 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, 7357201 + ... + 7357206.

It is an arithmetic number, because the mean of its divisors is an integer number (14714408).

Almost surely, 2^44143221 is an apocalyptic number.

It is an amenable number.

44143221 is a deficient number, since it is larger than the sum of its proper divisors (14714411).

44143221 is a wasteful number, since it uses less digits than its factorization.

44143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14714410.

The product of its digits is 768, while the sum is 21.

The square root of 44143221 is about 6644.0364989967. The cubic root of 44143221 is about 353.4174641442.

Adding to 44143221 its reverse (12234144), we get a palindrome (56377365).

The spelling of 44143221 in words is "forty-four million, one hundred forty-three thousand, two hundred twenty-one".