228535 has 4 divisors (see below), whose sum is σ = 274248. Its totient is φ = 182824.

The previous prime is 228523. The next prime is 228539. The reversal of 228535 is 535822.

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 228535 - 2⁹ = 228023 is a prime.

It is a Duffinian number.

228535 is a lucky number.

It is a plaindrome in base 11 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22849 + ... + 22858.

It is an arithmetic number, because the mean of its divisors is an integer number (68562).

2²²⁸⁵³⁵ is an apocalyptic number.

228535 is a deficient number, since it is larger than the sum of its proper divisors (45713).

228535 is an equidigital number, since it uses as much as digits as its factorization.

228535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45712.

The product of its digits is 2400, while the sum is 25.

The square root of 228535 is about 478.0533443038. The cubic root of 228535 is about 61.1388933977.

The spelling of 228535 in words is "two hundred twenty-eight thousand, five hundred thirty-five".