221843229 has 8 divisors (see below), whose sum is σ = 296305920. Its totient is φ = 147638016.

The previous prime is 221843227. The next prime is 221843233. The reversal of 221843229 is 922348122.

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

It is not a de Polignac number, because 221843229 - 2¹ = 221843227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221843229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221843227) 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, 62349 + ... + 65810.

It is an arithmetic number, because the mean of its divisors is an integer number (37038240).

Almost surely, 2^221843229 is an apocalyptic number.

It is an amenable number.

221843229 is a deficient number, since it is larger than the sum of its proper divisors (74462691).

221843229 is a wasteful number, since it uses less digits than its factorization.

221843229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128739.

The product of its digits is 13824, while the sum is 33.

The square root of 221843229 is about 14894.4026063485. The cubic root of 221843229 is about 605.3623301446.

The spelling of 221843229 in words is "two hundred twenty-one million, eight hundred forty-three thousand, two hundred twenty-nine".