205205531500051 has 8 divisors (see below), whose sum is σ = 214166865701664. Its totient is φ = 196247476846080.

The previous prime is 205205531500009. The next prime is 205205531500127. The reversal of 205205531500051 is 150005135502502.

205205531500051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205205531500051 - 2¹⁹ = 205205530975763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205205531501051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819759036 + ... + 820009321.

It is an arithmetic number, because the mean of its divisors is an integer number (26770858212708).

Almost surely, 2^{205205531500051} is an apocalyptic number.

205205531500051 is a deficient number, since it is larger than the sum of its proper divisors (8961334201613).

205205531500051 is a wasteful number, since it uses less digits than its factorization.

205205531500051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639773821.

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 205205531500051 in words is "two hundred five trillion, two hundred five billion, five hundred thirty-one million, five hundred thousand, fifty-one".