221244234 has 8 divisors (see below), whose sum is σ = 442488480. Its totient is φ = 73748076.

The previous prime is 221244229. The next prime is 221244253. The reversal of 221244234 is 432442122.

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

221244234 is an admirable number.

It is a super-2 number, since 2×221244234² = 97898022156493512, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18437014 + ... + 18437025.

It is an arithmetic number, because the mean of its divisors is an integer number (55311060).

Almost surely, 2^221244234 is an apocalyptic number.

221244234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221244234 is a wasteful number, since it uses less digits than its factorization.

221244234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36874044.

The product of its digits is 3072, while the sum is 24.

The square root of 221244234 is about 14874.2809574110. The cubic root of 221244234 is about 604.8169963082.

Adding to 221244234 its reverse (432442122), we get a palindrome (653686356).

The spelling of 221244234 in words is "two hundred twenty-one million, two hundred forty-four thousand, two hundred thirty-four".