228705115 has 4 divisors (see below), whose sum is σ = 274446144. Its totient is φ = 182964088.

The previous prime is 228705101. The next prime is 228705121. The reversal of 228705115 is 511507822.

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 228705115 - 2⁵ = 228705083 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 22870507 + ... + 22870516.

It is an arithmetic number, because the mean of its divisors is an integer number (68611536).

Almost surely, 2^228705115 is an apocalyptic number.

228705115 is a deficient number, since it is larger than the sum of its proper divisors (45741029).

228705115 is an equidigital number, since it uses as much as digits as its factorization.

228705115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45741028.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 228705115 is about 15122.9995371289. Note that the first 3 decimals coincide. The cubic root of 228705115 is about 611.5405965711.

The spelling of 228705115 in words is "two hundred twenty-eight million, seven hundred five thousand, one hundred fifteen".