217422613121166 has 32 divisors (see below), whose sum is σ = 483525463150080. Its totient is φ = 72419589274968.

The previous prime is 217422613121111. The next prime is 217422613121167. The reversal of 217422613121166 is 661121316224712.

It is a happy number.

217422613121166 is a `hidden beast` number, since 2 + 1 + 7 + 4 + 2 + 2 + 613 + 1 + 21 + 1 + 6 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217422613121167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1517013756 + ... + 1517157071.

It is an arithmetic number, because the mean of its divisors is an integer number (15110170723440).

Almost surely, 2^{217422613121166} is an apocalyptic number.

217422613121166 is an abundant number, since it is smaller than the sum of its proper divisors (266102850028914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217422613121166 is a wasteful number, since it uses less digits than its factorization.

217422613121166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034172165 (or 3034172159 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

Adding to 217422613121166 its reverse (661121316224712), we get a palindrome (878543929345878).

The spelling of 217422613121166 in words is "two hundred seventeen trillion, four hundred twenty-two billion, six hundred thirteen million, one hundred twenty-one thousand, one hundred sixty-six".