45044221 has 4 divisors (see below), whose sum is σ = 46597500. Its totient is φ = 43490944.

The previous prime is 45044213. The next prime is 45044239. The reversal of 45044221 is 12244054.

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 10692900 + 34351321 = 3270^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 45044221 - 2³ = 45044213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45044192 and 45044201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45044621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776596 + ... + 776653.

It is an arithmetic number, because the mean of its divisors is an integer number (11649375).

Almost surely, 2^45044221 is an apocalyptic number.

It is an amenable number.

45044221 is a deficient number, since it is larger than the sum of its proper divisors (1553279).

45044221 is a wasteful number, since it uses less digits than its factorization.

45044221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553278.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 45044221 is about 6711.4991618863. The cubic root of 45044221 is about 355.8058029562.

Adding to 45044221 its reverse (12244054), we get a palindrome (57288275).

The spelling of 45044221 in words is "forty-five million, forty-four thousand, two hundred twenty-one".