44445246221 has 8 divisors (see below), whose sum is σ = 44951447160. Its totient is φ = 43939196928.

The previous prime is 44445246191. The next prime is 44445246283. The reversal of 44445246221 is 12264254444.

It can be written as a sum of positive squares in 4 ways, for example, as 1600800100 + 42844446121 = 40010^2 + 206989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44445246221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44445246421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615215 + ... + 683651.

It is an arithmetic number, because the mean of its divisors is an integer number (5618930895).

Almost surely, 2^44445246221 is an apocalyptic number.

It is an amenable number.

44445246221 is a deficient number, since it is larger than the sum of its proper divisors (506200939).

44445246221 is an equidigital number, since it uses as much as digits as its factorization.

44445246221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75823.

The product of its digits is 245760, while the sum is 38.

The spelling of 44445246221 in words is "forty-four billion, four hundred forty-five million, two hundred forty-six thousand, two hundred twenty-one".