215315166 has 32 divisors (see below), whose sum is σ = 497415168. Its totient is φ = 61408640.

The previous prime is 215315159. The next prime is 215315209. The reversal of 215315166 is 661513512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94830 + ... + 97073.

It is an arithmetic number, because the mean of its divisors is an integer number (15544224).

Almost surely, 2^215315166 is an apocalyptic number.

215315166 is an abundant number, since it is smaller than the sum of its proper divisors (282100002).

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

215315166 is a wasteful number, since it uses less digits than its factorization.

215315166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191936.

The product of its digits is 5400, while the sum is 30.

The square root of 215315166 is about 14673.6214343972. The cubic root of 215315166 is about 599.3652231118.

Adding to 215315166 its reverse (661513512), we get a palindrome (876828678).

The spelling of 215315166 in words is "two hundred fifteen million, three hundred fifteen thousand, one hundred sixty-six".