453612321 has 6 divisors (see below), whose sum is σ = 655217810. Its totient is φ = 302408208.

The previous prime is 453612317. The next prime is 453612323. The reversal of 453612321 is 123216354.

453612321 is a `hidden beast` number, since 4 + 536 + 123 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 450500625 + 3111696 = 21225^2 + 1764^2 .

It is not a de Polignac number, because 453612321 - 2² = 453612317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (453612323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25200676 + ... + 25200693.

Almost surely, 2^453612321 is an apocalyptic number.

It is an amenable number.

453612321 is a deficient number, since it is larger than the sum of its proper divisors (201605489).

453612321 is a wasteful number, since it uses less digits than its factorization.

453612321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50401375 (or 50401372 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 453612321 is about 21298.1764712381. The cubic root of 453612321 is about 768.3544557266.

Adding to 453612321 its reverse (123216354), we get a palindrome (576828675).

The spelling of 453612321 in words is "four hundred fifty-three million, six hundred twelve thousand, three hundred twenty-one".