229512221 has 8 divisors (see below), whose sum is σ = 238367160. Its totient is φ = 220796928.

The previous prime is 229512211. The next prime is 229512259. The reversal of 229512221 is 122215922.

229512221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 128006596 + 101505625 = 11314^2 + 10075^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229512221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229512211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31556 + ... + 38141.

It is an arithmetic number, because the mean of its divisors is an integer number (29795895).

Almost surely, 2^229512221 is an apocalyptic number.

It is an amenable number.

229512221 is a deficient number, since it is larger than the sum of its proper divisors (8854939).

229512221 is an equidigital number, since it uses as much as digits as its factorization.

229512221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69823.

The product of its digits is 1440, while the sum is 26.

The square root of 229512221 is about 15149.6607552777. The cubic root of 229512221 is about 612.2591326126.

The spelling of 229512221 in words is "two hundred twenty-nine million, five hundred twelve thousand, two hundred twenty-one".