285013565 has 4 divisors (see below), whose sum is σ = 342016284. Its totient is φ = 228010848.

The previous prime is 285013559. The next prime is 285013577. The reversal of 285013565 is 565310582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565310582 = 2 ⋅282655291.

It can be written as a sum of positive squares in 2 ways, for example, as 179211769 + 105801796 = 13387^2 + 10286^2 .

It is a cyclic number.

It is not a de Polignac number, because 285013565 - 2⁴ = 285013549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28501352 + ... + 28501361.

It is an arithmetic number, because the mean of its divisors is an integer number (85504071).

Almost surely, 2^285013565 is an apocalyptic number.

It is an amenable number.

285013565 is a deficient number, since it is larger than the sum of its proper divisors (57002719).

285013565 is an equidigital number, since it uses as much as digits as its factorization.

285013565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57002718.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 285013565 is about 16882.3447719800. The cubic root of 285013565 is about 658.0948771952.

The spelling of 285013565 in words is "two hundred eighty-five million, thirteen thousand, five hundred sixty-five".