449052181 has 4 divisors (see below), whose sum is σ = 449882764. Its totient is φ = 448221600.

The previous prime is 449052173. The next prime is 449052187. The reversal of 449052181 is 181250944.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 294671556 + 154380625 = 17166^2 + 12425^2 .

It is a cyclic number.

It is not a de Polignac number, because 449052181 - 2³ = 449052173 is a prime.

It is a super-2 number, since 2×449052181² = 403295722521713522, 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 (449052187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414480 + ... + 415561.

It is an arithmetic number, because the mean of its divisors is an integer number (112470691).

Almost surely, 2^449052181 is an apocalyptic number.

It is an amenable number.

449052181 is a deficient number, since it is larger than the sum of its proper divisors (830583).

449052181 is an equidigital number, since it uses as much as digits as its factorization.

449052181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830582.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 449052181 is about 21190.8513514677. The cubic root of 449052181 is about 765.7710374454.

The spelling of 449052181 in words is "four hundred forty-nine million, fifty-two thousand, one hundred eighty-one".