4446207221 has 2 divisors, whose sum is σ = 4446207222. Its totient is φ = 4446207220.

The previous prime is 4446207133. The next prime is 4446207229. The reversal of 4446207221 is 1227026444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4338856900 + 107350321 = 65870^2 + 10361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4446207221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4446207229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2223103610 + 2223103611.

It is an arithmetic number, because the mean of its divisors is an integer number (2223103611).

Almost surely, 2^4446207221 is an apocalyptic number.

It is an amenable number.

4446207221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4446207221 is an equidigital number, since it uses as much as digits as its factorization.

4446207221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 4446207221 is about 66679.8861801668. The cubic root of 4446207221 is about 1644.3587231966.

The spelling of 4446207221 in words is "four billion, four hundred forty-six million, two hundred seven thousand, two hundred twenty-one".