203398625480521 has 9 divisors (see below), whose sum is σ = 203845497907629. Its totient is φ = 202952730647436.

The previous prime is 203398625480431. The next prime is 203398625480537. The reversal of 203398625480521 is 125084526893302.

The square root of 203398625480521 is 14261789.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 203398625480521 - 2¹⁵ = 203398625447753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203398625430521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6603192906 + ... + 6603223708.

Almost surely, 2^{203398625480521} is an apocalyptic number.

203398625480521 is the 14261789-th square number.

203398625480521 is the 7130895-th centered octagonal number.

It is an amenable number.

203398625480521 is a deficient number, since it is larger than the sum of its proper divisors (446872427108).

203398625480521 is an frugal number, since it uses more digits than its factorization.

203398625480521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62532 (or 31266 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 58.

The spelling of 203398625480521 in words is "two hundred three trillion, three hundred ninety-eight billion, six hundred twenty-five million, four hundred eighty thousand, five hundred twenty-one".