453221021 has 4 divisors (see below), whose sum is σ = 494422944. Its totient is φ = 412019100.

The previous prime is 453221017. The next prime is 453221039. The reversal of 453221021 is 120122354.

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 453221021 - 2² = 453221017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 453220984 and 453221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (453221221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20600945 + ... + 20600966.

It is an arithmetic number, because the mean of its divisors is an integer number (123605736).

Almost surely, 2^453221021 is an apocalyptic number.

It is an amenable number.

453221021 is a deficient number, since it is larger than the sum of its proper divisors (41201923).

453221021 is a wasteful number, since it uses less digits than its factorization.

453221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41201922.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 453221021 is about 21288.9882568430. The cubic root of 453221021 is about 768.1334567384.

Adding to 453221021 its reverse (120122354), we get a palindrome (573343375).

The spelling of 453221021 in words is "four hundred fifty-three million, two hundred twenty-one thousand, twenty-one".