229329921 has 12 divisors (see below), whose sum is σ = 307385232. Its totient is φ = 152083224.

The previous prime is 229329901. The next prime is 229329931. The reversal of 229329921 is 129923922.

It is not a de Polignac number, because 229329921 - 2⁵ = 229329889 is a prime.

It is a super-3 number, since 3×229329921³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 229329921.

It is not an unprimeable number, because it can be changed into a prime (229329901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459330 + ... + 459828.

It is an arithmetic number, because the mean of its divisors is an integer number (25615436).

Almost surely, 2^229329921 is an apocalyptic number.

It is an amenable number.

229329921 is a deficient number, since it is larger than the sum of its proper divisors (78055311).

229329921 is an frugal number, since it uses more digits than its factorization.

229329921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 809 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 229329921 is about 15143.6429236825. The cubic root of 229329921 is about 612.0969852491.

The spelling of 229329921 in words is "two hundred twenty-nine million, three hundred twenty-nine thousand, nine hundred twenty-one".