228243 has 4 divisors (see below), whose sum is σ = 304328. Its totient is φ = 152160.

The previous prime is 228233. The next prime is 228251. The reversal of 228243 is 342822.

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

It is not a de Polignac number, because 228243 - 2⁵ = 228211 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228203) 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, 38038 + ... + 38043.

It is an arithmetic number, because the mean of its divisors is an integer number (76082).

2²²⁸²⁴³ is an apocalyptic number.

228243 is a deficient number, since it is larger than the sum of its proper divisors (76085).

228243 is an equidigital number, since it uses as much as digits as its factorization.

228243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76084.

The product of its digits is 768, while the sum is 21.

The square root of 228243 is about 477.7478414394. The cubic root of 228243 is about 61.1128431710.

Subtracting from 228243 its product of digits (768), we obtain a triangular number (227475 = T₆₇₄).

The spelling of 228243 in words is "two hundred twenty-eight thousand, two hundred forty-three".