206454422143 has 4 divisors (see below), whose sum is σ = 206628352920. Its totient is φ = 206280491368.

The previous prime is 206454422131. The next prime is 206454422149. The reversal of 206454422143 is 341224454602.

206454422143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206454422143 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 (206454422149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86963608 + ... + 86965981.

It is an arithmetic number, because the mean of its divisors is an integer number (51657088230).

Almost surely, 2^206454422143 is an apocalyptic number.

206454422143 is a deficient number, since it is larger than the sum of its proper divisors (173930777).

206454422143 is a wasteful number, since it uses less digits than its factorization.

206454422143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173930776.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 206454422143 its reverse (341224454602), we get a palindrome (547678876745).

The spelling of 206454422143 in words is "two hundred six billion, four hundred fifty-four million, four hundred twenty-two thousand, one hundred forty-three".