63218225 has 24 divisors (see below), whose sum is σ = 94309440. Its totient is φ = 41065920.

The previous prime is 63218203. The next prime is 63218227. The reversal of 63218225 is 52281236.

It is not a de Polignac number, because 63218225 - 2⁶ = 63218161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63218227) 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 23 ways as a sum of consecutive naturals, for example, 6182 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (3929560).

Almost surely, 2^63218225 is an apocalyptic number.

It is an amenable number.

63218225 is a deficient number, since it is larger than the sum of its proper divisors (31091215).

63218225 is a wasteful number, since it uses less digits than its factorization.

63218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049 (or 19044 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 63218225 is about 7950.9889322021. The cubic root of 63218225 is about 398.3646250673.

The spelling of 63218225 in words is "sixty-three million, two hundred eighteen thousand, two hundred twenty-five".