221325064 has 16 divisors (see below), whose sum is σ = 415737900. Its totient is φ = 110461632.

The previous prime is 221325043. The next prime is 221325119. The reversal of 221325064 is 460523122.

It can be written as a sum of positive squares in 2 ways, for example, as 167184900 + 54140164 = 12930^2 + 7358^2 .

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 3 ways as a sum of consecutive naturals, for example, 20379 + ... + 29290.

Almost surely, 2^221325064 is an apocalyptic number.

It is an amenable number.

221325064 is a deficient number, since it is larger than the sum of its proper divisors (194412836).

221325064 is a wasteful number, since it uses less digits than its factorization.

221325064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50232 (or 50228 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 221325064 is about 14876.9978154196. The cubic root of 221325064 is about 604.8906425295.

Adding to 221325064 its reverse (460523122), we get a palindrome (681848186).

The spelling of 221325064 in words is "two hundred twenty-one million, three hundred twenty-five thousand, sixty-four".