215265 has 16 divisors (see below), whose sum is σ = 350208. Its totient is φ = 112896.

The previous prime is 215261. The next prime is 215273. The reversal of 215265 is 562512.

It is not a de Polignac number, because 215265 - 2² = 215261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 1758.

It is an arithmetic number, because the mean of its divisors is an integer number (21888).

It is a Poulet number, since it divides 2²¹⁵²⁶⁴-1.

2²¹⁵²⁶⁵ is an apocalyptic number.

It is an amenable number.

215265 is a deficient number, since it is larger than the sum of its proper divisors (134943).

215265 is a wasteful number, since it uses less digits than its factorization.

215265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248.

The product of its digits is 600, while the sum is 21.

The square root of 215265 is about 463.9665936250. The cubic root of 215265 is about 59.9318671055.

Adding to 215265 its reverse (562512), we get a palindrome (777777).

The spelling of 215265 in words is "two hundred fifteen thousand, two hundred sixty-five".