204040453 has 4 divisors (see below), whose sum is σ = 204761728. Its totient is φ = 203319180.

The previous prime is 204040427. The next prime is 204040457. The reversal of 204040453 is 354040402.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-204040453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204040457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360213 + ... + 360778.

It is an arithmetic number, because the mean of its divisors is an integer number (51190432).

Almost surely, 2^204040453 is an apocalyptic number.

It is an amenable number.

204040453 is a deficient number, since it is larger than the sum of its proper divisors (721275).

204040453 is an equidigital number, since it uses as much as digits as its factorization.

204040453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721274.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 204040453 is about 14284.2729251439. The cubic root of 204040453 is about 588.7154404430.

Adding to 204040453 its reverse (354040402), we get a palindrome (558080855).

The spelling of 204040453 in words is "two hundred four million, forty thousand, four hundred fifty-three".