221503130 has 8 divisors (see below), whose sum is σ = 398705652. Its totient is φ = 88601248.

The previous prime is 221503129. The next prime is 221503171. The reversal of 221503130 is 31305122.

It can be written as a sum of positive squares in 2 ways, for example, as 220136569 + 1366561 = 14837^2 + 1169^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 221503099 and 221503108.

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, 11075147 + ... + 11075166.

Almost surely, 2^221503130 is an apocalyptic number.

221503130 is a deficient number, since it is larger than the sum of its proper divisors (177202522).

221503130 is a wasteful number, since it uses less digits than its factorization.

221503130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22150320.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 221503130 is about 14882.9812201723. The cubic root of 221503130 is about 605.0528196491.

Adding to 221503130 its reverse (31305122), we get a palindrome (252808252).

The spelling of 221503130 in words is "two hundred twenty-one million, five hundred three thousand, one hundred thirty".