221304229 has 8 divisors (see below), whose sum is σ = 243080640. Its totient is φ = 200540736.

The previous prime is 221304211. The next prime is 221304253. The reversal of 221304229 is 922403122.

221304229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221304229 - 2⁵ = 221304197 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 (221304269) 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, 252772 + ... + 253645.

It is an arithmetic number, because the mean of its divisors is an integer number (30385080).

Almost surely, 2^221304229 is an apocalyptic number.

It is an amenable number.

221304229 is a deficient number, since it is larger than the sum of its proper divisors (21776411).

221304229 is a wasteful number, since it uses less digits than its factorization.

221304229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506459.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 221304229 is about 14876.2975568520. The cubic root of 221304229 is about 604.8716609589.

The spelling of 221304229 in words is "two hundred twenty-one million, three hundred four thousand, two hundred twenty-nine".