228287 has 4 divisors (see below), whose sum is σ = 233640. Its totient is φ = 222936.

The previous prime is 228281. The next prime is 228299. The reversal of 228287 is 782822.

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

It is a cyclic number.

It is not a de Polignac number, because 228287 - 2⁶ = 228223 is a prime.

It is a super-2 number, since 2×228287² = 104229908738, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

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 228287.

It is not an unprimeable number, because it can be changed into a prime (228281) 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, 2612 + ... + 2697.

It is an arithmetic number, because the mean of its divisors is an integer number (58410).

2²²⁸²⁸⁷ is an apocalyptic number.

228287 is a deficient number, since it is larger than the sum of its proper divisors (5353).

228287 is an equidigital number, since it uses as much as digits as its factorization.

228287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352.

The product of its digits is 3584, while the sum is 29.

The square root of 228287 is about 477.7938886173. The cubic root of 228287 is about 61.1167699688.

It can be divided in two parts, 228 and 287, that added together give a palindrome (515).

The spelling of 228287 in words is "two hundred twenty-eight thousand, two hundred eighty-seven".