204400553 has 8 divisors (see below), whose sum is σ = 234709440. Its totient is φ = 174368880.

The previous prime is 204400541. The next prime is 204400579. The reversal of 204400553 is 355004402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204400553 - 2¹⁰ = 204399529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204400523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67718 + ... + 70671.

It is an arithmetic number, because the mean of its divisors is an integer number (29338680).

Almost surely, 2^204400553 is an apocalyptic number.

It is an amenable number.

204400553 is a deficient number, since it is larger than the sum of its proper divisors (30308887).

204400553 is a wasteful number, since it uses less digits than its factorization.

204400553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138607.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 204400553 is about 14296.8721404369. The cubic root of 204400553 is about 589.0615676209.

Adding to 204400553 its reverse (355004402), we get a palindrome (559404955).

The spelling of 204400553 in words is "two hundred four million, four hundred thousand, five hundred fifty-three".