203430564 has 36 divisors (see below), whose sum is σ = 519327900. Its totient is φ = 67137600.

The previous prime is 203430553. The next prime is 203430571. The reversal of 203430564 is 465034302.

It can be written as a sum of positive squares in 2 ways, for example, as 134374464 + 69056100 = 11592^2 + 8310^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24339 + ... + 31610.

It is an arithmetic number, because the mean of its divisors is an integer number (14425775).

Almost surely, 2^203430564 is an apocalyptic number.

It is an amenable number.

203430564 is an abundant number, since it is smaller than the sum of its proper divisors (315897336).

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

203430564 is a wasteful number, since it uses less digits than its factorization.

203430564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56060 (or 56055 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 203430564 is about 14262.9086795085. The cubic root of 203430564 is about 588.1282866002.

Adding to 203430564 its reverse (465034302), we get a palindrome (668464866).

The spelling of 203430564 in words is "two hundred three million, four hundred thirty thousand, five hundred sixty-four".