285243655 has 4 divisors (see below), whose sum is σ = 342292392. Its totient is φ = 228194920.

The previous prime is 285243653. The next prime is 285243659. The reversal of 285243655 is 556342582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 285243655 - 2¹ = 285243653 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285243653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524361 + ... + 28524370.

It is an arithmetic number, because the mean of its divisors is an integer number (85573098).

Almost surely, 2^285243655 is an apocalyptic number.

285243655 is a deficient number, since it is larger than the sum of its proper divisors (57048737).

285243655 is an equidigital number, since it uses as much as digits as its factorization.

285243655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57048736.

The product of its digits is 288000, while the sum is 40.

The square root of 285243655 is about 16889.1579126965. The cubic root of 285243655 is about 658.2719217760.

The spelling of 285243655 in words is "two hundred eighty-five million, two hundred forty-three thousand, six hundred fifty-five".