448520221 has 2 divisors, whose sum is σ = 448520222. Its totient is φ = 448520220.

The previous prime is 448520203. The next prime is 448520239. The reversal of 448520221 is 122025844.

It is a balanced prime because it is at equal distance from previous prime (448520203) and next prime (448520239).

It can be written as a sum of positive squares in only one way, i.e., 443944900 + 4575321 = 21070^2 + 2139^2 .

It is a cyclic number.

It is not a de Polignac number, because 448520221 - 2¹⁵ = 448487453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 448520221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (448520021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224260110 + 224260111.

It is an arithmetic number, because the mean of its divisors is an integer number (224260111).

Almost surely, 2^448520221 is an apocalyptic number.

It is an amenable number.

448520221 is a deficient number, since it is larger than the sum of its proper divisors (1).

448520221 is an equidigital number, since it uses as much as digits as its factorization.

448520221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 448520221 is about 21178.2959890545. The cubic root of 448520221 is about 765.4685332370.

The spelling of 448520221 in words is "four hundred forty-eight million, five hundred twenty thousand, two hundred twenty-one".