229536721 has 8 divisors (see below), whose sum is σ = 232028064. Its totient is φ = 227052000.

The previous prime is 229536719. The next prime is 229536773. The reversal of 229536721 is 127635922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 229536721 - 2¹ = 229536719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229536781) 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 7 ways as a sum of consecutive naturals, for example, 100846 + ... + 103096.

It is an arithmetic number, because the mean of its divisors is an integer number (29003508).

Almost surely, 2^229536721 is an apocalyptic number.

It is an amenable number.

229536721 is a deficient number, since it is larger than the sum of its proper divisors (2491343).

229536721 is a wasteful number, since it uses less digits than its factorization.

229536721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311.

The product of its digits is 45360, while the sum is 37.

The square root of 229536721 is about 15150.4693326643. The cubic root of 229536721 is about 612.2809176762.

The spelling of 229536721 in words is "two hundred twenty-nine million, five hundred thirty-six thousand, seven hundred twenty-one".