215552 has 20 divisors (see below), whose sum is σ = 431706. Its totient is φ = 107520.

The previous prime is 215531. The next prime is 215563. The reversal of 215552 is 255512.

215552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 215296 + 256 = 464^2 + 16^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302 + ... + 722.

2²¹⁵⁵⁵² 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 215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215853).

215552 is an abundant number, since it is smaller than the sum of its proper divisors (216154).

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

215552 is an frugal number, since it uses more digits than its factorization.

215552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 423 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 215552 is about 464.2757801135. The cubic root of 215552 is about 59.9584898069.

It can be divided in two parts, 215 and 552, that added together give a palindrome (767).

The spelling of 215552 in words is "two hundred fifteen thousand, five hundred fifty-two".