215688896 has 42 divisors (see below), whose sum is σ = 437090820. Its totient is φ = 105572992.

The previous prime is 215688883. The next prime is 215688937. The reversal of 215688896 is 698886512.

215688896 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 902345 + ... + 902583.

Almost surely, 2^215688896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215688896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218545410).

215688896 is an abundant number, since it is smaller than the sum of its proper divisors (221401924).

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

215688896 is an frugal number, since it uses more digits than its factorization.

215688896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 300 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 53.

The square root of 215688896 is about 14686.3506699248. The cubic root of 215688896 is about 599.7118023331.

The spelling of 215688896 in words is "two hundred fifteen million, six hundred eighty-eight thousand, eight hundred ninety-six".