287215 has 16 divisors (see below), whose sum is σ = 380160. Its totient is φ = 207360.

The previous prime is 287191. The next prime is 287219. The reversal of 287215 is 512782.

It is not a de Polignac number, because 287215 - 2⁷ = 287087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2581 + ... + 2689.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2²⁸⁷²¹⁵ is an apocalyptic number.

287215 is a deficient number, since it is larger than the sum of its proper divisors (92945).

287215 is a wasteful number, since it uses less digits than its factorization.

287215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162.

The product of its digits is 1120, while the sum is 25.

The square root of 287215 is about 535.9244349719. The cubic root of 287215 is about 65.9784900826.

Adding to 287215 its reverse (512782), we get a palindrome (799997).

The spelling of 287215 in words is "two hundred eighty-seven thousand, two hundred fifteen".