221430244 has 24 divisors (see below), whose sum is σ = 450123968. Its totient is φ = 93342240.

The previous prime is 221430239. The next prime is 221430247. The reversal of 221430244 is 442034122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221430247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63114 + ... + 66529.

Almost surely, 2^221430244 is an apocalyptic number.

It is an amenable number.

221430244 is an abundant number, since it is smaller than the sum of its proper divisors (228693724).

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

221430244 is a wasteful number, since it uses less digits than its factorization.

221430244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129715 (or 129713 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 221430244 is about 14880.5323829492. The cubic root of 221430244 is about 604.9864477988.

Adding to 221430244 its reverse (442034122), we get a palindrome (663464366).

The spelling of 221430244 in words is "two hundred twenty-one million, four hundred thirty thousand, two hundred forty-four".