448813521 has 16 divisors (see below), whose sum is σ = 716056320. Its totient is φ = 276192720.

The previous prime is 448813499. The next prime is 448813529. The reversal of 448813521 is 125318844.

448813521 is a `hidden beast` number, since 44 + 88 + 13 + 521 = 666.

It is not a de Polignac number, because 448813521 - 2¹⁷ = 448682449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (448813529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638985 + ... + 639686.

It is an arithmetic number, because the mean of its divisors is an integer number (44753520).

Almost surely, 2^448813521 is an apocalyptic number.

It is an amenable number.

448813521 is a deficient number, since it is larger than the sum of its proper divisors (267242799).

448813521 is a wasteful number, since it uses less digits than its factorization.

448813521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278693 (or 1278687 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 448813521 is about 21185.2193993831. The cubic root of 448813521 is about 765.6353506883.

The spelling of 448813521 in words is "four hundred forty-eight million, eight hundred thirteen thousand, five hundred twenty-one".