444032221 has 2 divisors, whose sum is σ = 444032222. Its totient is φ = 444032220.

The previous prime is 444032177. The next prime is 444032263. The reversal of 444032221 is 122230444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410508121 + 33524100 = 20261^2 + 5790^2 .

It is a cyclic number.

It is not a de Polignac number, because 444032221 - 2⁷ = 444032093 is a prime.

It is a super-2 number, since 2×444032221² = 394329226572385682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 444032192 and 444032201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444032291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222016110 + 222016111.

It is an arithmetic number, because the mean of its divisors is an integer number (222016111).

Almost surely, 2^444032221 is an apocalyptic number.

It is an amenable number.

444032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

444032221 is an equidigital number, since it uses as much as digits as its factorization.

444032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 444032221 is about 21072.0720623293. The cubic root of 444032221 is about 762.9068163626.

Adding to 444032221 its reverse (122230444), we get a palindrome (566262665).

The spelling of 444032221 in words is "four hundred forty-four million, thirty-two thousand, two hundred twenty-one".