44561221 has 4 divisors (see below), whose sum is σ = 44575200. Its totient is φ = 44547244.

The previous prime is 44561207. The next prime is 44561227. The reversal of 44561221 is 12216544.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 44561221 - 2⁷ = 44561093 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 (44561227) 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, 390 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (11143800).

Almost surely, 2^44561221 is an apocalyptic number.

It is an amenable number.

44561221 is a deficient number, since it is larger than the sum of its proper divisors (13979).

44561221 is an equidigital number, since it uses as much as digits as its factorization.

44561221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13978.

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

The square root of 44561221 is about 6675.4191628691. The cubic root of 44561221 is about 354.5294857649.

Adding to 44561221 its reverse (12216544), we get a palindrome (56777765).

The spelling of 44561221 in words is "forty-four million, five hundred sixty-one thousand, two hundred twenty-one".