206385543 has 64 divisors (see below), whose sum is σ = 396211200. Its totient is φ = 103109760.

The previous prime is 206385539. The next prime is 206385607. The reversal of 206385543 is 345583602.

It is a happy number.

It is not a de Polignac number, because 206385543 - 2² = 206385539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206385498 and 206385507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206385523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44473 + ... + 48893.

It is an arithmetic number, because the mean of its divisors is an integer number (6190800).

Almost surely, 2^206385543 is an apocalyptic number.

206385543 is a deficient number, since it is larger than the sum of its proper divisors (189825657).

206385543 is a wasteful number, since it uses less digits than its factorization.

206385543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469 (or 4463 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 206385543 is about 14366.1248428378. The cubic root of 206385543 is about 590.9622743834.

The spelling of 206385543 in words is "two hundred six million, three hundred eighty-five thousand, five hundred forty-three".