205513044543 has 24 divisors (see below), whose sum is σ = 303252019200. Its totient is φ = 134056535184.

The previous prime is 205513044509. The next prime is 205513044553. The reversal of 205513044543 is 345440315502.

205513044543 is a `hidden beast` number, since 20 + 5 + 51 + 3 + 0 + 44 + 543 = 666.

It is not a de Polignac number, because 205513044543 - 2⁶ = 205513044479 is a prime.

It is a super-2 number, since 2×205513044543² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205513044498 and 205513044507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205513044553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1507818 + ... + 1638456.

It is an arithmetic number, because the mean of its divisors is an integer number (12635500800).

Almost surely, 2^205513044543 is an apocalyptic number.

205513044543 is a deficient number, since it is larger than the sum of its proper divisors (97738974657).

205513044543 is a wasteful number, since it uses less digits than its factorization.

205513044543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134411 (or 134408 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 205513044543 in words is "two hundred five billion, five hundred thirteen million, forty-four thousand, five hundred forty-three".