221443130 has 16 divisors (see below), whose sum is σ = 412342920. Its totient is φ = 85522752.

The previous prime is 221443129. The next prime is 221443133. The reversal of 221443130 is 31344122.

221443130 is digitally balanced in base 3, 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 126945289 + 94497841 = 11267^2 + 9721^2 .

It is not an unprimeable number, because it can be changed into a prime (221443133) 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, 381509 + ... + 382088.

Almost surely, 2^221443130 is an apocalyptic number.

221443130 is a deficient number, since it is larger than the sum of its proper divisors (190899790).

221443130 is a wasteful number, since it uses less digits than its factorization.

221443130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763633.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 221443130 is about 14880.9653584705. The cubic root of 221443130 is about 604.9981831788.

Adding to 221443130 its reverse (31344122), we get a palindrome (252787252).

The spelling of 221443130 in words is "two hundred twenty-one million, four hundred forty-three thousand, one hundred thirty".