221040530 has 16 divisors (see below), whose sum is σ = 406339200. Its totient is φ = 86534832.

The previous prime is 221040529. The next prime is 221040541. The reversal of 221040530 is 35040122.

221040530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221040499 and 221040508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234680 + ... + 235619.

It is an arithmetic number, because the mean of its divisors is an integer number (25396200).

Almost surely, 2^221040530 is an apocalyptic number.

221040530 is a deficient number, since it is larger than the sum of its proper divisors (185298670).

221040530 is a wasteful number, since it uses less digits than its factorization.

221040530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470353.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 221040530 is about 14867.4318562420. The cubic root of 221040530 is about 604.6313169339.

Adding to 221040530 its reverse (35040122), we get a palindrome (256080652).

The spelling of 221040530 in words is "two hundred twenty-one million, forty thousand, five hundred thirty".