285285215 has 16 divisors (see below), whose sum is σ = 358041600. Its totient is φ = 217807392.

The previous prime is 285285181. The next prime is 285285251. The reversal of 285285215 is 512582582.

It is a cyclic number.

It is not a de Polignac number, because 285285215 - 2¹² = 285281119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52496 + ... + 57674.

It is an arithmetic number, because the mean of its divisors is an integer number (22377600).

Almost surely, 2^285285215 is an apocalyptic number.

285285215 is a deficient number, since it is larger than the sum of its proper divisors (72756385).

285285215 is a wasteful number, since it uses less digits than its factorization.

285285215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5686.

The product of its digits is 64000, while the sum is 38.

The square root of 285285215 is about 16890.3882430215. The cubic root of 285285215 is about 658.3038902960.

The spelling of 285285215 in words is "two hundred eighty-five million, two hundred eighty-five thousand, two hundred fifteen".