285230161 has 6 divisors (see below), whose sum is σ = 288092486. Its totient is φ = 282396000.

The previous prime is 285230159. The next prime is 285230171. The reversal of 285230161 is 161032582.

It can be written as a sum of positive squares in 3 ways, for example, as 157653136 + 127577025 = 12556^2 + 11295^2 .

It is not a de Polignac number, because 285230161 - 2¹ = 285230159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285230111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3780 + ... + 24181.

Almost surely, 2^285230161 is an apocalyptic number.

It is an amenable number.

285230161 is a deficient number, since it is larger than the sum of its proper divisors (2862325).

285230161 is an equidigital number, since it uses as much as digits as its factorization.

285230161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28163 (or 28062 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 285230161 is about 16888.7584209142. The cubic root of 285230161 is about 658.2615413390.

The spelling of 285230161 in words is "two hundred eighty-five million, two hundred thirty thousand, one hundred sixty-one".