205131300028 has 18 divisors (see below), whose sum is σ = 378867853896. Its totient is φ = 97167457224.

The previous prime is 205131299959. The next prime is 205131300029. The reversal of 205131300028 is 820003131502.

It is a junction number, because it is equal to n+sod(n) for n = 205131299975 and 205131300011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205131300029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71027400 + ... + 71030287.

Almost surely, 2^205131300028 is an apocalyptic number.

It is an amenable number.

205131300028 is a deficient number, since it is larger than the sum of its proper divisors (173736553868).

205131300028 is a wasteful number, since it uses less digits than its factorization.

205131300028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142057729 (or 142057708 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 205131300028 in words is "two hundred five billion, one hundred thirty-one million, three hundred thousand, twenty-eight".