44251605221 has 4 divisors (see below), whose sum is σ = 44252616672. Its totient is φ = 44250593772.

The previous prime is 44251605187. The next prime is 44251605239. The reversal of 44251605221 is 12250615244.

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 44251605221 - 2⁶ = 44251605157 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 (44251605271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436985 + ... + 528638.

It is an arithmetic number, because the mean of its divisors is an integer number (11063154168).

Almost surely, 2^44251605221 is an apocalyptic number.

It is an amenable number.

44251605221 is a deficient number, since it is larger than the sum of its proper divisors (1011451).

44251605221 is an equidigital number, since it uses as much as digits as its factorization.

44251605221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011450.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 44251605221 in words is "forty-four billion, two hundred fifty-one million, six hundred five thousand, two hundred twenty-one".