229999999 has 4 divisors (see below), whose sum is σ = 234893664. Its totient is φ = 225106336.

The previous prime is 229999981. The next prime is 230000003. The reversal of 229999999 is 999999922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229999999 - 2⁷ = 229999871 is a prime.

It is a Duffinian number.

229999999 is a modest number, since divided by 99999 gives 2299 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229999949) 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, 2446762 + ... + 2446855.

It is an arithmetic number, because the mean of its divisors is an integer number (58723416).

Almost surely, 2^229999999 is an apocalyptic number.

229999999 is a deficient number, since it is larger than the sum of its proper divisors (4893665).

229999999 is an equidigital number, since it uses as much as digits as its factorization.

229999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893664.

The product of its digits is 19131876, while the sum is 67.

The square root of 229999999 is about 15165.7508551341. The cubic root of 229999999 is about 612.6925666349.

The spelling of 229999999 in words is "two hundred twenty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".