228218005 has 8 divisors (see below), whose sum is σ = 273943512. Its totient is φ = 182519808.

The previous prime is 228217963. The next prime is 228218033. The reversal of 228218005 is 500812822.

228218005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 142229476 + 85988529 = 11926^2 + 9273^2 .

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 228218005 - 2¹⁹ = 227693717 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 7 ways as a sum of consecutive naturals, for example, 25389 + ... + 33181.

It is an arithmetic number, because the mean of its divisors is an integer number (34242939).

Almost surely, 2^228218005 is an apocalyptic number.

It is an amenable number.

228218005 is a deficient number, since it is larger than the sum of its proper divisors (45725507).

228218005 is an equidigital number, since it uses as much as digits as its factorization.

228218005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 228218005 is about 15106.8860126765. The cubic root of 228218005 is about 611.1061225733.

The spelling of 228218005 in words is "two hundred twenty-eight million, two hundred eighteen thousand, five".