229781229 has 4 divisors (see below), whose sum is σ = 306374976. Its totient is φ = 153187484.

The previous prime is 229781203. The next prime is 229781243. The reversal of 229781229 is 922187922.

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 cyclic number.

It is not a de Polignac number, because 229781229 - 2¹⁶ = 229715693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229781029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38296869 + ... + 38296874.

It is an arithmetic number, because the mean of its divisors is an integer number (76593744).

Almost surely, 2^229781229 is an apocalyptic number.

It is an amenable number.

229781229 is a deficient number, since it is larger than the sum of its proper divisors (76593747).

229781229 is an equidigital number, since it uses as much as digits as its factorization.

229781229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76593746.

The product of its digits is 72576, while the sum is 42.

The square root of 229781229 is about 15158.5365058768. The cubic root of 229781229 is about 612.4982459481.

The spelling of 229781229 in words is "two hundred twenty-nine million, seven hundred eighty-one thousand, two hundred twenty-nine".