450310021 has 4 divisors (see below), whose sum is σ = 514640032. Its totient is φ = 385980012.

The previous prime is 450310009. The next prime is 450310027. The reversal of 450310021 is 120013054.

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 450310021 - 2¹³ = 450301829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 450309977 and 450310004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450310027) 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, 32164995 + ... + 32165008.

It is an arithmetic number, because the mean of its divisors is an integer number (128660008).

Almost surely, 2^450310021 is an apocalyptic number.

It is an amenable number.

450310021 is a deficient number, since it is larger than the sum of its proper divisors (64330011).

450310021 is an equidigital number, since it uses as much as digits as its factorization.

450310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64330010.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 450310021 is about 21220.5094425181. The cubic root of 450310021 is about 766.4853712677.

Adding to 450310021 its reverse (120013054), we get a palindrome (570323075).

The spelling of 450310021 in words is "four hundred fifty million, three hundred ten thousand, twenty-one".