203230530513 has 24 divisors (see below), whose sum is σ = 311713857000. Its totient is φ = 127151783424.

The previous prime is 203230530499. The next prime is 203230530553. The reversal of 203230530513 is 315035032302.

203230530513 is a `hidden beast` number, since 20 + 32 + 30 + 530 + 51 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25591040784 + 177639489729 = 159972^2 + 421473^2 .

It is not a de Polignac number, because 203230530513 - 2⁴ = 203230530497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203230530553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1849618 + ... + 1956411.

It is an arithmetic number, because the mean of its divisors is an integer number (12988077375).

Almost surely, 2^203230530513 is an apocalyptic number.

It is an amenable number.

203230530513 is a deficient number, since it is larger than the sum of its proper divisors (108483326487).

203230530513 is a wasteful number, since it uses less digits than its factorization.

203230530513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806401 (or 3806398 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 27.

Adding to 203230530513 its reverse (315035032302), we get a palindrome (518265562815).

The spelling of 203230530513 in words is "two hundred three billion, two hundred thirty million, five hundred thirty thousand, five hundred thirteen".