205050502501 has 12 divisors (see below), whose sum is σ = 226953146532. Its totient is φ = 184161765888.

The previous prime is 205050502457. The next prime is 205050502519. The reversal of 205050502501 is 105205050502.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4333062276 + 200717440225 = 65826^2 + 448015^2 .

It is not a de Polignac number, because 205050502501 - 2⁹ = 205050501989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205050562501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5743020 + ... + 5778613.

It is an arithmetic number, because the mean of its divisors is an integer number (18912762211).

Almost surely, 2^205050502501 is an apocalyptic number.

It is an amenable number.

205050502501 is a deficient number, since it is larger than the sum of its proper divisors (21902644031).

205050502501 is a wasteful number, since it uses less digits than its factorization.

205050502501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11521720 (or 11521683 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The spelling of 205050502501 in words is "two hundred five billion, fifty million, five hundred two thousand, five hundred one".