452217621 has 4 divisors (see below), whose sum is σ = 602956832. Its totient is φ = 301478412.

The previous prime is 452217617. The next prime is 452217641. The reversal of 452217621 is 126712254.

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 not a de Polignac number, because 452217621 - 2² = 452217617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452217641) 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, 75369601 + ... + 75369606.

It is an arithmetic number, because the mean of its divisors is an integer number (150739208).

Almost surely, 2^452217621 is an apocalyptic number.

It is an amenable number.

452217621 is a deficient number, since it is larger than the sum of its proper divisors (150739211).

452217621 is a wasteful number, since it uses less digits than its factorization.

452217621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150739210.

The product of its digits is 6720, while the sum is 30.

The square root of 452217621 is about 21265.4090249870. The cubic root of 452217621 is about 767.5661731045.

Adding to 452217621 its reverse (126712254), we get a palindrome (578929875).

The spelling of 452217621 in words is "four hundred fifty-two million, two hundred seventeen thousand, six hundred twenty-one".