215984 has 10 divisors (see below), whose sum is σ = 418500. Its totient is φ = 107984.

The previous prime is 215983. The next prime is 216023. The reversal of 215984 is 489512.

215984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2²¹⁵⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

215984 is a deficient number, since it is larger than the sum of its proper divisors (202516).

215984 is a wasteful number, since it uses less digits than its factorization.

215984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13507 (or 13501 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 215984 is about 464.7407879668. The cubic root of 215984 is about 59.9985184819.

The spelling of 215984 in words is "two hundred fifteen thousand, nine hundred eighty-four".