206543455 has 8 divisors (see below), whose sum is σ = 262431792. Its totient is φ = 155515008.

The previous prime is 206543437. The next prime is 206543459. The reversal of 206543455 is 554345602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206543455 - 2⁹ = 206542943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206543455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206543459) 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 7 ways as a sum of consecutive naturals, for example, 1214877 + ... + 1215046.

It is an arithmetic number, because the mean of its divisors is an integer number (32803974).

Almost surely, 2^206543455 is an apocalyptic number.

206543455 is a deficient number, since it is larger than the sum of its proper divisors (55888337).

206543455 is a wasteful number, since it uses less digits than its factorization.

206543455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429945.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 206543455 is about 14371.6197764901. The cubic root of 206543455 is about 591.1129571666.

The spelling of 206543455 in words is "two hundred six million, five hundred forty-three thousand, four hundred fifty-five".