229955921 has 16 divisors (see below), whose sum is σ = 254672208. Its totient is φ = 206284800.

The previous prime is 229955911. The next prime is 229955927. The reversal of 229955921 is 129559922.

It can be written as a sum of positive squares in 8 ways, for example, as 147962896 + 81993025 = 12164^2 + 9055^2 .

It is a cyclic number.

It is not a de Polignac number, because 229955921 - 2⁶ = 229955857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229955927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168281 + ... + 169641.

It is an arithmetic number, because the mean of its divisors is an integer number (15917013).

Almost surely, 2^229955921 is an apocalyptic number.

It is an amenable number.

229955921 is a deficient number, since it is larger than the sum of its proper divisors (24716287).

229955921 is a wasteful number, since it uses less digits than its factorization.

229955921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732.

The product of its digits is 145800, while the sum is 44.

The square root of 229955921 is about 15164.2975768744. The cubic root of 229955921 is about 612.6534246226.

The spelling of 229955921 in words is "two hundred twenty-nine million, nine hundred fifty-five thousand, nine hundred twenty-one".