204431520 has 48 divisors (see below), whose sum is σ = 643960800. Its totient is φ = 54514944.

The previous prime is 204431509. The next prime is 204431569. The reversal of 204431520 is 25134402.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 212470 + ... + 213429.

It is an arithmetic number, because the mean of its divisors is an integer number (13415850).

Almost surely, 2^204431520 is an apocalyptic number.

204431520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204431520 is an abundant number, since it is smaller than the sum of its proper divisors (439529280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204431520 is a wasteful number, since it uses less digits than its factorization.

204431520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425917 (or 425909 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 204431520 is about 14297.9550985447. The cubic root of 204431520 is about 589.0913140317.

Adding to 204431520 its reverse (25134402), we get a palindrome (229565922).

The spelling of 204431520 in words is "two hundred four million, four hundred thirty-one thousand, five hundred twenty".