221305130 has 8 divisors (see below), whose sum is σ = 398349252. Its totient is φ = 88522048.

The previous prime is 221305129. The next prime is 221305163. The reversal of 221305130 is 31503122.

221305130 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 2 ways, for example, as 220136569 + 1168561 = 14837^2 + 1081^2 .

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 = 221305099 and 221305108.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11065247 + ... + 11065266.

Almost surely, 2^221305130 is an apocalyptic number.

221305130 is a deficient number, since it is larger than the sum of its proper divisors (177044122).

221305130 is a wasteful number, since it uses less digits than its factorization.

221305130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22130520.

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

The square root of 221305130 is about 14876.3278398938. The cubic root of 221305130 is about 604.8724818328.

Adding to 221305130 its reverse (31503122), we get a palindrome (252808252).

The spelling of 221305130 in words is "two hundred twenty-one million, three hundred five thousand, one hundred thirty".