228011 has 4 divisors (see below), whose sum is σ = 260592. Its totient is φ = 195432.

The previous prime is 227993. The next prime is 228013. The reversal of 228011 is 110822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110822 = 2 ⋅55411.

It is a cyclic number.

It is not a de Polignac number, because 228011 - 2⁶ = 227947 is a prime.

It is a super-2 number, since 2×228011² = 103978032242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (228013) 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, 16280 + ... + 16293.

It is an arithmetic number, because the mean of its divisors is an integer number (65148).

2²²⁸⁰¹¹ is an apocalyptic number.

228011 is a deficient number, since it is larger than the sum of its proper divisors (32581).

228011 is an equidigital number, since it uses as much as digits as its factorization.

228011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32580.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 228011 is about 477.5049737961. The cubic root of 228011 is about 61.0921298871.

Adding to 228011 its reverse (110822), we get a palindrome (338833).

The spelling of 228011 in words is "two hundred twenty-eight thousand, eleven".