215936 has 32 divisors (see below), whose sum is σ = 493680. Its totient is φ = 92160.

The previous prime is 215927. The next prime is 215939. The reversal of 215936 is 639512.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215939) by changing a digit.

215936 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776 + ... + 1016.

215936 is a Friedman number, since it can be written as (51+9)^3-2^6, using all its digits and the basic arithmetic operations.

2²¹⁵⁹³⁶ 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 215936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246840).

215936 is an abundant number, since it is smaller than the sum of its proper divisors (277744).

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

215936 is an equidigital number, since it uses as much as digits as its factorization.

215936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 250 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 215936 is about 464.6891434066. The cubic root of 215936 is about 59.9940734887.

The spelling of 215936 in words is "two hundred fifteen thousand, nine hundred thirty-six".