444042221 has 8 divisors (see below), whose sum is σ = 509694720. Its totient is φ = 378944208.

The previous prime is 444042211. The next prime is 444042251. The reversal of 444042221 is 122240444.

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

It is a cyclic number.

It is not a de Polignac number, because 444042221 - 2¹⁴ = 444025837 is a prime.

It is a super-2 number, since 2×444042221² = 394346988061225682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444042211) 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 7 ways as a sum of consecutive naturals, for example, 136901 + ... + 140106.

It is an arithmetic number, because the mean of its divisors is an integer number (63711840).

Almost surely, 2^444042221 is an apocalyptic number.

It is an amenable number.

444042221 is a deficient number, since it is larger than the sum of its proper divisors (65652499).

444042221 is a wasteful number, since it uses less digits than its factorization.

444042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277243.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 444042221 is about 21072.3093418828. The cubic root of 444042221 is about 762.9125434326.

Adding to 444042221 its reverse (122240444), we get a palindrome (566282665).

The spelling of 444042221 in words is "four hundred forty-four million, forty-two thousand, two hundred twenty-one".