206421443255 has 16 divisors (see below), whose sum is σ = 248843905920. Its totient is φ = 164378648352.

The previous prime is 206421443191. The next prime is 206421443339. The reversal of 206421443255 is 552344124602.

206421443255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 206421443255 - 2⁶ = 206421443191 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7416956 + ... + 7444734.

It is an arithmetic number, because the mean of its divisors is an integer number (15552744120).

Almost surely, 2^206421443255 is an apocalyptic number.

206421443255 is a deficient number, since it is larger than the sum of its proper divisors (42422462665).

206421443255 is a wasteful number, since it uses less digits than its factorization.

206421443255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34558.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 206421443255 its reverse (552344124602), we get a palindrome (758765567857).

The spelling of 206421443255 in words is "two hundred six billion, four hundred twenty-one million, four hundred forty-three thousand, two hundred fifty-five".