215171196 has 12 divisors (see below), whose sum is σ = 502066152. Its totient is φ = 71723728.

The previous prime is 215171191. The next prime is 215171197. The reversal of 215171196 is 691171512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215171191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8965455 + ... + 8965478.

It is an arithmetic number, because the mean of its divisors is an integer number (41838846).

Almost surely, 2^215171196 is an apocalyptic number.

It is an amenable number.

215171196 is an abundant number, since it is smaller than the sum of its proper divisors (286894956).

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

215171196 is a wasteful number, since it uses less digits than its factorization.

215171196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930940 (or 17930938 counting only the distinct ones).

The product of its digits is 3780, while the sum is 33.

The square root of 215171196 is about 14668.7148721352. The cubic root of 215171196 is about 599.2316052582.

The spelling of 215171196 in words is "two hundred fifteen million, one hundred seventy-one thousand, one hundred ninety-six".