215278882 has 32 divisors (see below), whose sum is σ = 403974144. Its totient is φ = 83764800.

The previous prime is 215278879. The next prime is 215278883. The reversal of 215278882 is 288872512.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (215278883) 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 15 ways as a sum of consecutive naturals, for example, 1407 + ... + 20797.

It is an arithmetic number, because the mean of its divisors is an integer number (12624192).

Almost surely, 2^215278882 is an apocalyptic number.

215278882 is a deficient number, since it is larger than the sum of its proper divisors (188695262).

215278882 is a wasteful number, since it uses less digits than its factorization.

215278882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19474.

The product of its digits is 143360, while the sum is 43.

The square root of 215278882 is about 14672.3850140323. The cubic root of 215278882 is about 599.3315537240.

The spelling of 215278882 in words is "two hundred fifteen million, two hundred seventy-eight thousand, eight hundred eighty-two".