288281 has 4 divisors (see below), whose sum is σ = 329472. Its totient is φ = 247092.

The previous prime is 288257. The next prime is 288283. The reversal of 288281 is 182882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 288281 - 2¹⁰ = 287257 is a prime.

It is a super-2 number, since 2×288281² = 166211869922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 288281.

It is not an unprimeable number, because it can be changed into a prime (288283) 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, 20585 + ... + 20598.

It is an arithmetic number, because the mean of its divisors is an integer number (82368).

2²⁸⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

288281 is a deficient number, since it is larger than the sum of its proper divisors (41191).

288281 is an equidigital number, since it uses as much as digits as its factorization.

288281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41190.

The product of its digits is 2048, while the sum is 29.

The square root of 288281 is about 536.9180570627. The cubic root of 288281 is about 66.0600158102.

The spelling of 288281 in words is "two hundred eighty-eight thousand, two hundred eighty-one".