205253055243 has 32 divisors (see below), whose sum is σ = 305312454720. Its totient is φ = 136280586240.

The previous prime is 205253055233. The next prime is 205253055347. The reversal of 205253055243 is 342550352502.

205253055243 is a `hidden beast` number, since 2 + 0 + 52 + 53 + 0 + 552 + 4 + 3 = 666.

It is not a de Polignac number, because 205253055243 - 2¹⁰ = 205253054219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205253055198 and 205253055207.

It is not an unprimeable number, because it can be changed into a prime (205253055223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22110763 + ... + 22120043.

It is an arithmetic number, because the mean of its divisors is an integer number (9541014210).

Almost surely, 2^205253055243 is an apocalyptic number.

205253055243 is a deficient number, since it is larger than the sum of its proper divisors (100059399477).

205253055243 is a wasteful number, since it uses less digits than its factorization.

205253055243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12524 (or 12518 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 205253055243 in words is "two hundred five billion, two hundred fifty-three million, fifty-five thousand, two hundred forty-three".