229728211 has 4 divisors (see below), whose sum is σ = 229758552. Its totient is φ = 229697872.

The previous prime is 229728199. The next prime is 229728217. The reversal of 229728211 is 112827922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 229728211 - 2⁵ = 229728179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229728217) 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, 6636 + ... + 22438.

It is an arithmetic number, because the mean of its divisors is an integer number (57439638).

Almost surely, 2^229728211 is an apocalyptic number.

229728211 is a deficient number, since it is larger than the sum of its proper divisors (30341).

229728211 is a wasteful number, since it uses less digits than its factorization.

229728211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30340.

The product of its digits is 8064, while the sum is 34.

The square root of 229728211 is about 15156.7876213926. The cubic root of 229728211 is about 612.4511345717.

The spelling of 229728211 in words is "two hundred twenty-nine million, seven hundred twenty-eight thousand, two hundred eleven".