221325364 has 12 divisors (see below), whose sum is σ = 417113284. Its totient is φ = 102150144.

The previous prime is 221325353. The next prime is 221325367. The reversal of 221325364 is 463523122.

It can be written as a sum of positive squares in 2 ways, for example, as 44222500 + 177102864 = 6650^2 + 13308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221325367) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2128077 + ... + 2128180.

Almost surely, 2^221325364 is an apocalyptic number.

It is an amenable number.

221325364 is a deficient number, since it is larger than the sum of its proper divisors (195787920).

221325364 is a wasteful number, since it uses less digits than its factorization.

221325364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256274 (or 4256272 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 221325364 is about 14877.0078980956. The cubic root of 221325364 is about 604.8909158336.

Adding to 221325364 its reverse (463523122), we get a palindrome (684848486).

The spelling of 221325364 in words is "two hundred twenty-one million, three hundred twenty-five thousand, three hundred sixty-four".