44165221 has 4 divisors (see below), whose sum is σ = 46085472. Its totient is φ = 42244972.

The previous prime is 44165203. The next prime is 44165287. The reversal of 44165221 is 12256144.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 44165221 - 2⁵ = 44165189 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 (44165921) 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, 960091 + ... + 960136.

It is an arithmetic number, because the mean of its divisors is an integer number (11521368).

Almost surely, 2^44165221 is an apocalyptic number.

It is an amenable number.

44165221 is a deficient number, since it is larger than the sum of its proper divisors (1920251).

44165221 is a wasteful number, since it uses less digits than its factorization.

44165221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920250.

The product of its digits is 1920, while the sum is 25.

The square root of 44165221 is about 6645.6919128109. The cubic root of 44165221 is about 353.4761661958.

The spelling of 44165221 in words is "forty-four million, one hundred sixty-five thousand, two hundred twenty-one".