206221043547 has 6 divisors (see below), whose sum is σ = 297874840692. Its totient is φ = 137480695692.

The previous prime is 206221043513. The next prime is 206221043597. The reversal of 206221043547 is 745340122602.

206221043547 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 2 + 104 + 3 + 547 = 666.

It is not a de Polignac number, because 206221043547 - 2²⁰ = 206219994971 is a prime.

It is a super-5 number, since 5×206221043547⁵ (a number of 58 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (206221043507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11456724633 + ... + 11456724650.

It is an arithmetic number, because the mean of its divisors is an integer number (49645806782).

Almost surely, 2^206221043547 is an apocalyptic number.

206221043547 is a deficient number, since it is larger than the sum of its proper divisors (91653797145).

206221043547 is a wasteful number, since it uses less digits than its factorization.

206221043547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22913449289 (or 22913449286 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 206221043547 in words is "two hundred six billion, two hundred twenty-one million, forty-three thousand, five hundred forty-seven".