44162221 has 4 divisors (see below), whose sum is σ = 44301852. Its totient is φ = 44022592.

The previous prime is 44162191. The next prime is 44162291. The reversal of 44162221 is 12226144.

It is a happy number.

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 19272100 + 24890121 = 4390^2 + 4989^2 .

It is a cyclic number.

It is not a de Polignac number, because 44162221 - 2⁵ = 44162189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44162192 and 44162201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44162291) 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, 69340 + ... + 69973.

It is an arithmetic number, because the mean of its divisors is an integer number (11075463).

Almost surely, 2^44162221 is an apocalyptic number.

It is an amenable number.

44162221 is a deficient number, since it is larger than the sum of its proper divisors (139631).

44162221 is a wasteful number, since it uses less digits than its factorization.

44162221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139630.

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

The square root of 44162221 is about 6645.4661988456. The cubic root of 44162221 is about 353.4681625186.

Adding to 44162221 its reverse (12226144), we get a palindrome (56388365).

The spelling of 44162221 in words is "forty-four million, one hundred sixty-two thousand, two hundred twenty-one".