206735243 has 32 divisors (see below), whose sum is σ = 255794112. Its totient is φ = 164505600.

The previous prime is 206735237. The next prime is 206735251. The reversal of 206735243 is 342537602.

It is a cyclic number.

It is not a de Polignac number, because 206735243 - 2¹⁰ = 206734219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206735213) 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 31 ways as a sum of consecutive naturals, for example, 216455 + ... + 217407.

It is an arithmetic number, because the mean of its divisors is an integer number (7993566).

Almost surely, 2^206735243 is an apocalyptic number.

206735243 is a deficient number, since it is larger than the sum of its proper divisors (49058869).

206735243 is a wasteful number, since it uses less digits than its factorization.

206735243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 206735243 is about 14378.2906842225. The cubic root of 206735243 is about 591.2958618571.

The spelling of 206735243 in words is "two hundred six million, seven hundred thirty-five thousand, two hundred forty-three".