215171066206 has 8 divisors (see below), whose sum is σ = 322962575040. Its totient is φ = 107516874528.

The previous prime is 215171066171. The next prime is 215171066207. The reversal of 215171066206 is 602660171512.

It is a happy number.

215171066206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215171066207) 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, 34325371 + ... + 34331638.

It is an arithmetic number, because the mean of its divisors is an integer number (40370321880).

Almost surely, 2^215171066206 is an apocalyptic number.

215171066206 is a deficient number, since it is larger than the sum of its proper divisors (107791508834).

215171066206 is a wasteful number, since it uses less digits than its factorization.

215171066206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68658578.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 215171066206 in words is "two hundred fifteen billion, one hundred seventy-one million, sixty-six thousand, two hundred six".