228065 has 4 divisors (see below), whose sum is σ = 273684. Its totient is φ = 182448.

The previous prime is 228061. The next prime is 228077. The reversal of 228065 is 560822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560822 = 2 ⋅280411.

It can be written as a sum of positive squares in 2 ways, for example, as 35344 + 192721 = 188^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 228065 - 2² = 228061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228065.

It is not an unprimeable number, because it can be changed into a prime (228061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22802 + ... + 22811.

It is an arithmetic number, because the mean of its divisors is an integer number (68421).

2²²⁸⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

228065 is a deficient number, since it is larger than the sum of its proper divisors (45619).

228065 is an equidigital number, since it uses as much as digits as its factorization.

228065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45618.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 228065 is about 477.5615143623. The cubic root of 228065 is about 61.0969523366.

Adding to 228065 its reverse (560822), we get a palindrome (788887).

The spelling of 228065 in words is "two hundred twenty-eight thousand, sixty-five".