229881209 has 4 divisors (see below), whose sum is σ = 241980240. Its totient is φ = 217782180.

The previous prime is 229881187. The next prime is 229881227. The reversal of 229881209 is 902188922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-229881209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (229883209) 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, 6049487 + ... + 6049524.

It is an arithmetic number, because the mean of its divisors is an integer number (60495060).

Almost surely, 2^229881209 is an apocalyptic number.

It is an amenable number.

229881209 is a deficient number, since it is larger than the sum of its proper divisors (12099031).

229881209 is a wasteful number, since it uses less digits than its factorization.

229881209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12099030.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 229881209 is about 15161.8339589906. The cubic root of 229881209 is about 612.5870676726.

The spelling of 229881209 in words is "two hundred twenty-nine million, eight hundred eighty-one thousand, two hundred nine".