228591 has 12 divisors (see below), whose sum is σ = 360360. Its totient is φ = 138480.

The previous prime is 228587. The next prime is 228593. The reversal of 228591 is 195822.

It is not a de Polignac number, because 228591 - 2² = 228587 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (30030).

2²²⁸⁵⁹¹ is an apocalyptic number.

228591 is a deficient number, since it is larger than the sum of its proper divisors (131769).

228591 is a wasteful number, since it uses less digits than its factorization.

228591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326 (or 2323 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 228591 is about 478.1119115856. Note that the first 3 decimals coincide. The cubic root of 228591 is about 61.1438867954.

The spelling of 228591 in words is "two hundred twenty-eight thousand, five hundred ninety-one".