221304130 has 32 divisors (see below), whose sum is σ = 425988720. Its totient is φ = 82483200.

The previous prime is 221304121. The next prime is 221304131. The reversal of 221304130 is 31403122.

It is a happy number.

221304130 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 8 ways, for example, as 197205849 + 24098281 = 14043^2 + 4909^2 .

It is not an unprimeable number, because it can be changed into a prime (221304131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10726 + ... + 23614.

Almost surely, 2^221304130 is an apocalyptic number.

221304130 is a deficient number, since it is larger than the sum of its proper divisors (204684590).

221304130 is a wasteful number, since it uses less digits than its factorization.

221304130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13014.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221304130 is about 14876.2942294108. The cubic root of 221304130 is about 604.8715707628.

Adding to 221304130 its reverse (31403122), we get a palindrome (252707252).

The spelling of 221304130 in words is "two hundred twenty-one million, three hundred four thousand, one hundred thirty".