228221812329 has 16 divisors (see below), whose sum is σ = 349531890048. Its totient is φ = 129750469632.

The previous prime is 228221812319. The next prime is 228221812331. The reversal of 228221812329 is 923218122822.

228221812329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228221812329 - 2⁸ = 228221812073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228221812319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27578872 + ... + 27587145.

It is an arithmetic number, because the mean of its divisors is an integer number (21845743128).

Almost surely, 2^228221812329 is an apocalyptic number.

It is an amenable number.

228221812329 is a deficient number, since it is larger than the sum of its proper divisors (121310077719).

228221812329 is a wasteful number, since it uses less digits than its factorization.

228221812329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55166224.

The product of its digits is 110592, while the sum is 42.

The spelling of 228221812329 in words is "two hundred twenty-eight billion, two hundred twenty-one million, eight hundred twelve thousand, three hundred twenty-nine".