215996 has 12 divisors (see below), whose sum is σ = 412440. Its totient is φ = 98160.

The previous prime is 215983. The next prime is 216023. The reversal of 215996 is 699512.

It is a plaindrome in base 16.

It is a nialpdrome in base 13.

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 215996.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2411 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (34370).

2²¹⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

215996 is a deficient number, since it is larger than the sum of its proper divisors (196444).

215996 is a wasteful number, since it uses less digits than its factorization.

215996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924 (or 4922 counting only the distinct ones).

The product of its digits is 4860, while the sum is 32.

The square root of 215996 is about 464.7536982101. The cubic root of 215996 is about 59.9996296273. Note that the first 3 decimals are identical.

The spelling of 215996 in words is "two hundred fifteen thousand, nine hundred ninety-six".