44423001221 has 4 divisors (see below), whose sum is σ = 44423425152. Its totient is φ = 44422577292.

The previous prime is 44423001187. The next prime is 44423001229. The reversal of 44423001221 is 12210032444.

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 a de Polignac number, because none of the positive numbers 2^k-44423001221 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 (44423001229) 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, 72236 + ... + 306698.

It is an arithmetic number, because the mean of its divisors is an integer number (11105856288).

Almost surely, 2^44423001221 is an apocalyptic number.

It is an amenable number.

44423001221 is a deficient number, since it is larger than the sum of its proper divisors (423931).

44423001221 is a wasteful number, since it uses less digits than its factorization.

44423001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423930.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 44423001221 its reverse (12210032444), we get a palindrome (56633033665).

The spelling of 44423001221 in words is "forty-four billion, four hundred twenty-three million, one thousand, two hundred twenty-one".