221325130 has 32 divisors (see below), whose sum is σ = 430693200. Its totient is φ = 81403392.

The previous prime is 221325119. The next prime is 221325131. The reversal of 221325130 is 31523122.

It is a Cunningham number, because it is equal to 14877²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 32729841 + 188595289 = 5721^2 + 13733^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221325098 and 221325107.

It is not an unprimeable number, because it can be changed into a prime (221325131) 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 15 ways as a sum of consecutive naturals, for example, 31806 + ... + 38134.

Almost surely, 2^221325130 is an apocalyptic number.

221325130 is a deficient number, since it is larger than the sum of its proper divisors (209368070).

221325130 is a wasteful number, since it uses less digits than its factorization.

221325130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6618.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 221325130 is about 14877.0000336089. Note that the first 4 decimals coincide. The cubic root of 221325130 is about 604.8907026564.

Adding to 221325130 its reverse (31523122), we get a palindrome (252848252).

The spelling of 221325130 in words is "two hundred twenty-one million, three hundred twenty-five thousand, one hundred thirty".