215368 has 8 divisors (see below), whose sum is σ = 403830. Its totient is φ = 107680.

The previous prime is 215359. The next prime is 215381. The reversal of 215368 is 863512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114244 + 101124 = 338^2 + 318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 13453 + ... + 13468.

2²¹⁵³⁶⁸ is an apocalyptic number.

It is an amenable number.

215368 is a deficient number, since it is larger than the sum of its proper divisors (188462).

215368 is a wasteful number, since it uses less digits than its factorization.

215368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26927 (or 26923 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 215368 is about 464.0775797213. The cubic root of 215368 is about 59.9414243149.

The spelling of 215368 in words is "two hundred fifteen thousand, three hundred sixty-eight".