229443021 has 24 divisors (see below), whose sum is σ = 338858520. Its totient is φ = 149558400.

The previous prime is 229443017. The next prime is 229443029. The reversal of 229443021 is 120344922.

229443021 is a `hidden beast` number, since 229 + 4 + 430 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1010025 + 228432996 = 1005^2 + 15114^2 .

It is not a de Polignac number, because 229443021 - 2² = 229443017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229443029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98215 + ... + 100523.

It is an arithmetic number, because the mean of its divisors is an integer number (14119105).

Almost surely, 2^229443021 is an apocalyptic number.

It is an amenable number.

229443021 is a deficient number, since it is larger than the sum of its proper divisors (109415499).

229443021 is a wasteful number, since it uses less digits than its factorization.

229443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 229443021 is about 15147.3767035748. The cubic root of 229443021 is about 612.1975925478.

Adding to 229443021 its reverse (120344922), we get a palindrome (349787943).

The spelling of 229443021 in words is "two hundred twenty-nine million, four hundred forty-three thousand, twenty-one".