217115201606 has 16 divisors (see below), whose sum is σ = 347641839360. Its totient is φ = 101395533960.

The previous prime is 217115201591. The next prime is 217115201609. The reversal of 217115201606 is 606102511712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217115201609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40233626 + ... + 40239021.

It is an arithmetic number, because the mean of its divisors is an integer number (21727614960).

Almost surely, 2^217115201606 is an apocalyptic number.

217115201606 is a deficient number, since it is larger than the sum of its proper divisors (130526637754).

217115201606 is a wasteful number, since it uses less digits than its factorization.

217115201606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80472739.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 217115201606 in words is "two hundred seventeen billion, one hundred fifteen million, two hundred one thousand, six hundred six".