228711815 has 4 divisors (see below), whose sum is σ = 274454184. Its totient is φ = 182969448.

The previous prime is 228711799. The next prime is 228711853. The reversal of 228711815 is 518117822.

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 228711815 - 2⁴ = 228711799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22871177 + ... + 22871186.

It is an arithmetic number, because the mean of its divisors is an integer number (68613546).

Almost surely, 2^228711815 is an apocalyptic number.

228711815 is a deficient number, since it is larger than the sum of its proper divisors (45742369).

228711815 is an equidigital number, since it uses as much as digits as its factorization.

228711815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45742368.

The product of its digits is 8960, while the sum is 35.

The square root of 228711815 is about 15123.2210524081. The cubic root of 228711815 is about 611.5465682813.

The spelling of 228711815 in words is "two hundred twenty-eight million, seven hundred eleven thousand, eight hundred fifteen".