228018659 has 4 divisors (see below), whose sum is σ = 248747640. Its totient is φ = 207289680.

The previous prime is 228018649. The next prime is 228018683. The reversal of 228018659 is 956810822.

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 228018659 - 2⁴ = 228018643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228018629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10364474 + ... + 10364495.

It is an arithmetic number, because the mean of its divisors is an integer number (62186910).

Almost surely, 2^228018659 is an apocalyptic number.

228018659 is a deficient number, since it is larger than the sum of its proper divisors (20728981).

228018659 is a wasteful number, since it uses less digits than its factorization.

228018659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20728980.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 228018659 is about 15100.2867191322. The cubic root of 228018659 is about 610.9281391750.

The spelling of 228018659 in words is "two hundred twenty-eight million, eighteen thousand, six hundred fifty-nine".