288161 has 4 divisors (see below), whose sum is σ = 293652. Its totient is φ = 282672.

The previous prime is 288137. The next prime is 288179. The reversal of 288161 is 161882.

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

It can be written as a sum of positive squares in 2 ways, for example, as 185761 + 102400 = 431^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 288161 - 2¹⁰ = 287137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 288161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288181) 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, 2666 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (73413).

2²⁸⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

288161 is a deficient number, since it is larger than the sum of its proper divisors (5491).

288161 is an equidigital number, since it uses as much as digits as its factorization.

288161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490.

The product of its digits is 768, while the sum is 26.

The square root of 288161 is about 536.8062965354. The cubic root of 288161 is about 66.0508484792.

The spelling of 288161 in words is "two hundred eighty-eight thousand, one hundred sixty-one".