204430651 has 4 divisors (see below), whose sum is σ = 204868872. Its totient is φ = 203992432.

The previous prime is 204430621. The next prime is 204430663. The reversal of 204430651 is 156034402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204430651 - 2⁵ = 204430619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204430621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218410 + ... + 219343.

It is an arithmetic number, because the mean of its divisors is an integer number (51217218).

Almost surely, 2^204430651 is an apocalyptic number.

204430651 is a deficient number, since it is larger than the sum of its proper divisors (438221).

204430651 is an equidigital number, since it uses as much as digits as its factorization.

204430651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438220.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 204430651 is about 14297.9247095514. The cubic root of 204430651 is about 589.0904793250.

The spelling of 204430651 in words is "two hundred four million, four hundred thirty thousand, six hundred fifty-one".