448216981 has 4 divisors (see below), whose sum is σ = 448725472. Its totient is φ = 447708492.

The previous prime is 448216969. The next prime is 448216987. The reversal of 448216981 is 189612844.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 448216981 - 2⁵ = 448216949 is a prime.

It is a super-2 number, since 2×448216981² = 401796924113508722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448216987) 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 3 ways as a sum of consecutive naturals, for example, 252921 + ... + 254686.

It is an arithmetic number, because the mean of its divisors is an integer number (112181368).

Almost surely, 2^448216981 is an apocalyptic number.

It is an amenable number.

448216981 is a deficient number, since it is larger than the sum of its proper divisors (508491).

448216981 is an equidigital number, since it uses as much as digits as its factorization.

448216981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508490.

The product of its digits is 110592, while the sum is 43.

The square root of 448216981 is about 21171.1355623642. The cubic root of 448216981 is about 765.2959858257.

The spelling of 448216981 in words is "four hundred forty-eight million, two hundred sixteen thousand, nine hundred eighty-one".