206227552221 has 6 divisors (see below), whose sum is σ = 297884242110. Its totient is φ = 137485034808.

The previous prime is 206227552081. The next prime is 206227552283. The reversal of 206227552221 is 122255722602.

206227552221 is a `hidden beast` number, since 2 + 0 + 62 + 2 + 75 + 522 + 2 + 1 = 666.

206227552221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 201273363225 + 4954188996 = 448635^2 + 70386^2 .

It is not a de Polignac number, because 206227552221 - 2¹⁸ = 206227290077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206227552621) 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 5 ways as a sum of consecutive naturals, for example, 11457086226 + ... + 11457086243.

It is an arithmetic number, because the mean of its divisors is an integer number (49647373685).

Almost surely, 2^206227552221 is an apocalyptic number.

It is an amenable number.

206227552221 is a deficient number, since it is larger than the sum of its proper divisors (91656689889).

206227552221 is a wasteful number, since it uses less digits than its factorization.

206227552221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22914172475 (or 22914172472 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 206227552221 in words is "two hundred six billion, two hundred twenty-seven million, five hundred fifty-two thousand, two hundred twenty-one".