228263 has 4 divisors (see below), whose sum is σ = 260880. Its totient is φ = 195648.

The previous prime is 228257. The next prime is 228281. The reversal of 228263 is 362822.

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 228263 - 2⁶ = 228199 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228203) 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, 16298 + ... + 16311.

It is an arithmetic number, because the mean of its divisors is an integer number (65220).

2²²⁸²⁶³ is an apocalyptic number.

228263 is a deficient number, since it is larger than the sum of its proper divisors (32617).

228263 is an equidigital number, since it uses as much as digits as its factorization.

228263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32616.

The product of its digits is 1152, while the sum is 23.

The square root of 228263 is about 477.7687725250. The cubic root of 228263 is about 61.1146281416.

The spelling of 228263 in words is "two hundred twenty-eight thousand, two hundred sixty-three".