215056 has 10 divisors (see below), whose sum is σ = 416702. Its totient is φ = 107520.

The previous prime is 215051. The next prime is 215063. The reversal of 215056 is 650512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 147456 + 67600 = 384^2 + 260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215051) by changing a digit.

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, 6705 + ... + 6736.

2²¹⁵⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

215056 is a deficient number, since it is larger than the sum of its proper divisors (201646).

215056 is a wasteful number, since it uses less digits than its factorization.

215056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13449 (or 13443 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 215056 is about 463.7413071962. The cubic root of 215056 is about 59.9124649483.

Adding to 215056 its reverse (650512), we get a palindrome (865568).

The spelling of 215056 in words is "two hundred fifteen thousand, fifty-six".