215159168 has 64 divisors (see below), whose sum is σ = 491884800. Its totient is φ = 91832832.

The previous prime is 215159167. The next prime is 215159179. The reversal of 215159168 is 861951512.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215159167) 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, 393071 + ... + 393617.

It is an arithmetic number, because the mean of its divisors is an integer number (7685700).

Almost surely, 2^215159168 is an apocalyptic number.

215159168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215159168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245942400).

215159168 is an abundant number, since it is smaller than the sum of its proper divisors (276725632).

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

215159168 is an equidigital number, since it uses as much as digits as its factorization.

215159168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 995 counting only the distinct ones).

The product of its digits is 21600, while the sum is 38.

The square root of 215159168 is about 14668.3048782059. The cubic root of 215159168 is about 599.2204394327.

The spelling of 215159168 in words is "two hundred fifteen million, one hundred fifty-nine thousand, one hundred sixty-eight".