203125642205506 has 32 divisors (see below), whose sum is σ = 326760482865600. Its totient is φ = 94414203132480.

The previous prime is 203125642205477. The next prime is 203125642205539. The reversal of 203125642205506 is 605502246521302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103598805 + ... + 105541288.

It is an arithmetic number, because the mean of its divisors is an integer number (10211265089550).

Almost surely, 2^{203125642205506} is an apocalyptic number.

203125642205506 is a deficient number, since it is larger than the sum of its proper divisors (123634840660094).

203125642205506 is a wasteful number, since it uses less digits than its factorization.

203125642205506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209140594.

The product of its (nonzero) digits is 864000, while the sum is 43.

Adding to 203125642205506 its reverse (605502246521302), we get a palindrome (808627888726808).

The spelling of 203125642205506 in words is "two hundred three trillion, one hundred twenty-five billion, six hundred forty-two million, two hundred five thousand, five hundred six".