228116215 has 4 divisors (see below), whose sum is σ = 273739464. Its totient is φ = 182492968.

The previous prime is 228116191. The next prime is 228116219. The reversal of 228116215 is 512611822.

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 228116215 - 2⁹ = 228115703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228116219) 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, 22811617 + ... + 22811626.

It is an arithmetic number, because the mean of its divisors is an integer number (68434866).

Almost surely, 2^228116215 is an apocalyptic number.

228116215 is a deficient number, since it is larger than the sum of its proper divisors (45623249).

228116215 is an equidigital number, since it uses as much as digits as its factorization.

228116215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45623248.

The product of its digits is 1920, while the sum is 28.

The square root of 228116215 is about 15103.5166434841. The cubic root of 228116215 is about 611.0152536945.

It can be divided in two parts, 2281 and 16215, that added together give a square (18496 = 136²).

The spelling of 228116215 in words is "two hundred twenty-eight million, one hundred sixteen thousand, two hundred fifteen".