450305821 has 8 divisors (see below), whose sum is σ = 515067840. Its totient is φ = 385651968.

The previous prime is 450305813. The next prime is 450305837. The reversal of 450305821 is 128503054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 450305821 - 2³ = 450305813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 450305821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450305221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17911 + ... + 34948.

It is an arithmetic number, because the mean of its divisors is an integer number (64383480).

Almost surely, 2^450305821 is an apocalyptic number.

It is an amenable number.

450305821 is a deficient number, since it is larger than the sum of its proper divisors (64762019).

450305821 is a wasteful number, since it uses less digits than its factorization.

450305821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54083.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 450305821 is about 21220.4104814209. The cubic root of 450305821 is about 766.4829882809.

Adding to 450305821 its reverse (128503054), we get a palindrome (578808875).

The spelling of 450305821 in words is "four hundred fifty million, three hundred five thousand, eight hundred twenty-one".