64320225 has 24 divisors (see below), whose sum is σ = 111942240. Its totient is φ = 32497920.

The previous prime is 64320209. The next prime is 64320229. The reversal of 64320225 is 52202346.

It is not a de Polignac number, because 64320225 - 2⁴ = 64320209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64320195 and 64320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64320229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21144 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (4664260).

Almost surely, 2^64320225 is an apocalyptic number.

It is an amenable number.

64320225 is a deficient number, since it is larger than the sum of its proper divisors (47622015).

64320225 is a wasteful number, since it uses less digits than its factorization.

64320225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45169 (or 45164 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 64320225 is about 8019.9890897681. The cubic root of 64320225 is about 400.6660258252. Note that the first 3 decimals are identical.

The spelling of 64320225 in words is "sixty-four million, three hundred twenty thousand, two hundred twenty-five".