228605233 has 4 divisors (see below), whose sum is σ = 229164580. Its totient is φ = 228045888.

The previous prime is 228605197. The next prime is 228605249. The reversal of 228605233 is 332506822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332506822 = 2 ⋅166253411.

It can be written as a sum of positive squares in 2 ways, for example, as 85969984 + 142635249 = 9272^2 + 11943^2 .

It is a cyclic number.

It is not a de Polignac number, because 228605233 - 2¹³ = 228597041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228605195 and 228605204.

It is not an unprimeable number, because it can be changed into a prime (228605263) 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, 279060 + ... + 279877.

It is an arithmetic number, because the mean of its divisors is an integer number (57291145).

Almost surely, 2^228605233 is an apocalyptic number.

It is an amenable number.

228605233 is a deficient number, since it is larger than the sum of its proper divisors (559347).

228605233 is an equidigital number, since it uses as much as digits as its factorization.

228605233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559346.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 228605233 is about 15119.6968554267. The cubic root of 228605233 is about 611.4515579094.

The spelling of 228605233 in words is "two hundred twenty-eight million, six hundred five thousand, two hundred thirty-three".