206543053 has 4 divisors (see below), whose sum is σ = 217413760. Its totient is φ = 195672348.

The previous prime is 206543039. The next prime is 206543087. The reversal of 206543053 is 350345602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206543053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206543023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5435325 + ... + 5435362.

It is an arithmetic number, because the mean of its divisors is an integer number (54353440).

Almost surely, 2^206543053 is an apocalyptic number.

It is an amenable number.

206543053 is a deficient number, since it is larger than the sum of its proper divisors (10870707).

206543053 is a wasteful number, since it uses less digits than its factorization.

206543053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10870706.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 206543053 is about 14371.6057905858. The cubic root of 206543053 is about 591.1125736677.

Adding to 206543053 its reverse (350345602), we get a palindrome (556888655).

It can be divided in two parts, 2065 and 43053, that multiplied together give a triangular number (88904445 = T₁₃₃₃₄).

The spelling of 206543053 in words is "two hundred six million, five hundred forty-three thousand, fifty-three".