228750811 has 4 divisors (see below), whose sum is σ = 236638800. Its totient is φ = 220862824.

The previous prime is 228750803. The next prime is 228750857. The reversal of 228750811 is 118057822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118057822 = 2 ⋅59028911.

It is a cyclic number.

It is not a de Polignac number, because 228750811 - 2³ = 228750803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228750871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3943951 + ... + 3944008.

It is an arithmetic number, because the mean of its divisors is an integer number (59159700).

Almost surely, 2^228750811 is an apocalyptic number.

228750811 is a deficient number, since it is larger than the sum of its proper divisors (7887989).

228750811 is an equidigital number, since it uses as much as digits as its factorization.

228750811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887988.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 228750811 is about 15124.5102730634. The cubic root of 228750811 is about 611.5813231025.

The spelling of 228750811 in words is "two hundred twenty-eight million, seven hundred fifty thousand, eight hundred eleven".