205151220028 has 12 divisors (see below), whose sum is σ = 359832439120. Its totient is φ = 102341951712.

The previous prime is 205151220019. The next prime is 205151220041. The reversal of 205151220028 is 820022151502.

It is a junction number, because it is equal to n+sod(n) for n = 205151219978 and 205151220005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58412601 + ... + 58416112.

Almost surely, 2^205151220028 is an apocalyptic number.

It is an amenable number.

205151220028 is a deficient number, since it is larger than the sum of its proper divisors (154681219092).

205151220028 is a wasteful number, since it uses less digits than its factorization.

205151220028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116829156 (or 116829154 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 205151220028 in words is "two hundred five billion, one hundred fifty-one million, two hundred twenty thousand, twenty-eight".