204352551 has 28 divisors (see below), whose sum is σ = 329972328. Its totient is φ = 125749584.

The previous prime is 204352523. The next prime is 204352553. The reversal of 204352551 is 155253402.

It is a happy number.

204352551 is a `hidden beast` number, since 20 + 43 + 52 + 551 = 666.

It is not a de Polignac number, because 204352551 - 2¹³ = 204344359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204352553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1305 + ... + 20258.

It is an arithmetic number, because the mean of its divisors is an integer number (11784726).

Almost surely, 2^204352551 is an apocalyptic number.

204352551 is a deficient number, since it is larger than the sum of its proper divisors (125619777).

204352551 is an equidigital number, since it uses as much as digits as its factorization.

204352551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21594 (or 21579 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 204352551 is about 14295.1932830585. The cubic root of 204352551 is about 589.0154517197.

The spelling of 204352551 in words is "two hundred four million, three hundred fifty-two thousand, five hundred fifty-one".