203125642205505 has 32 divisors (see below), whose sum is σ = 336227483727360. Its totient is φ = 104591957648640.

The previous prime is 203125642205477. The next prime is 203125642205539. The reversal of 203125642205505 is 505502246521302.

It is not a de Polignac number, because 203125642205505 - 2⁶ = 203125642205441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6054382 + ... + 21045351.

It is an arithmetic number, because the mean of its divisors is an integer number (10507108866480).

Almost surely, 2^{203125642205505} is an apocalyptic number.

It is an amenable number.

203125642205505 is a deficient number, since it is larger than the sum of its proper divisors (133101841521855).

203125642205505 is a wasteful number, since it uses less digits than its factorization.

203125642205505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27117001.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 203125642205505 its reverse (505502246521302), we get a palindrome (708627888726807).

The spelling of 203125642205505 in words is "two hundred three trillion, one hundred twenty-five billion, six hundred forty-two million, two hundred five thousand, five hundred five".