228218899 has 8 divisors (see below), whose sum is σ = 242066880. Its totient is φ = 214554600.

The previous prime is 228218867. The next prime is 228218917. The reversal of 228218899 is 998812822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228218899 - 2⁵ = 228218867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228018899) 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 7 ways as a sum of consecutive naturals, for example, 43357 + ... + 48334.

It is an arithmetic number, because the mean of its divisors is an integer number (30258360).

Almost surely, 2^228218899 is an apocalyptic number.

228218899 is a deficient number, since it is larger than the sum of its proper divisors (13847981).

228218899 is a wasteful number, since it uses less digits than its factorization.

228218899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91841.

The product of its digits is 331776, while the sum is 49.

The square root of 228218899 is about 15106.9156018030. The cubic root of 228218899 is about 611.1069205357.

The spelling of 228218899 in words is "two hundred twenty-eight million, two hundred eighteen thousand, eight hundred ninety-nine".