206006553 has 6 divisors (see below), whose sum is σ = 297565034. Its totient is φ = 137337696.

The previous prime is 206006551. The next prime is 206006557. The reversal of 206006553 is 355600602.

206006553 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 0 + 655 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 154554624 + 51451929 = 12432^2 + 7173^2 .

It is not a de Polignac number, because 206006553 - 2¹ = 206006551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206006551) 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 5 ways as a sum of consecutive naturals, for example, 11444800 + ... + 11444817.

Almost surely, 2^206006553 is an apocalyptic number.

It is an amenable number.

206006553 is a deficient number, since it is larger than the sum of its proper divisors (91558481).

206006553 is a wasteful number, since it uses less digits than its factorization.

206006553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22889623 (or 22889620 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 206006553 is about 14352.9283771640. The cubic root of 206006553 is about 590.6003206955.

The spelling of 206006553 in words is "two hundred six million, six thousand, five hundred fifty-three".