221325505 has 8 divisors (see below), whose sum is σ = 265680000. Its totient is φ = 177000816.

The previous prime is 221325497. The next prime is 221325539. The reversal of 221325505 is 505523122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221325505 - 2³ = 221325497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221325505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15096 + ... + 25894.

It is an arithmetic number, because the mean of its divisors is an integer number (33210000).

Almost surely, 2^221325505 is an apocalyptic number.

It is an amenable number.

221325505 is a deficient number, since it is larger than the sum of its proper divisors (44354495).

221325505 is a wasteful number, since it uses less digits than its factorization.

221325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14903.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 221325505 is about 14877.0126369510. The cubic root of 221325505 is about 604.8910442864.

Adding to 221325505 its reverse (505523122), we get a palindrome (726848627).

The spelling of 221325505 in words is "two hundred twenty-one million, three hundred twenty-five thousand, five hundred five".