215798 has 16 divisors (see below), whose sum is σ = 374544. Its totient is φ = 92160.

The previous prime is 215797. The next prime is 215801. The reversal of 215798 is 897512.

215798 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215798.

It is not an unprimeable number, because it can be changed into a prime (215797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 662.

It is an arithmetic number, because the mean of its divisors is an integer number (23409).

2²¹⁵⁷⁹⁸ is an apocalyptic number.

215798 is a deficient number, since it is larger than the sum of its proper divisors (158746).

215798 is a wasteful number, since it uses less digits than its factorization.

215798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607.

The product of its digits is 5040, while the sum is 32.

The square root of 215798 is about 464.5406333142. The cubic root of 215798 is about 59.9812904628.

The spelling of 215798 in words is "two hundred fifteen thousand, seven hundred ninety-eight".