168215117 has 8 divisors (see below), whose sum is σ = 194954112. Its totient is φ = 142153200.

The previous prime is 168215111. The next prime is 168215137. The reversal of 168215117 is 711512861.

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

It is not a de Polignac number, because 168215117 - 2¹⁰ = 168214093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168215111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168734 + ... + 169727.

It is an arithmetic number, because the mean of its divisors is an integer number (24369264).

Almost surely, 2^168215117 is an apocalyptic number.

It is an amenable number.

168215117 is a deficient number, since it is larger than the sum of its proper divisors (26738995).

168215117 is an equidigital number, since it uses as much as digits as its factorization.

168215117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338539.

The product of its digits is 3360, while the sum is 32.

The square root of 168215117 is about 12969.7770605358. Note that the first 3 decimals coincide. The cubic root of 168215117 is about 552.0202473232.

Adding to 168215117 its reverse (711512861), we get a palindrome (879727978).

The spelling of 168215117 in words is "one hundred sixty-eight million, two hundred fifteen thousand, one hundred seventeen".