63218825 has 12 divisors (see below), whose sum is σ = 79155648. Its totient is φ = 50082000.

The previous prime is 63218821. The next prime is 63218839. The reversal of 63218825 is 52881236.

It is not a de Polignac number, because 63218825 - 2² = 63218821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63218821) 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 11 ways as a sum of consecutive naturals, for example, 9701 + ... + 14850.

It is an arithmetic number, because the mean of its divisors is an integer number (6596304).

Almost surely, 2^63218825 is an apocalyptic number.

It is an amenable number.

63218825 is a deficient number, since it is larger than the sum of its proper divisors (15936823).

63218825 is a wasteful number, since it uses less digits than its factorization.

63218825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24664 (or 24659 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 63218825 is about 7951.0266632681. The cubic root of 63218825 is about 398.3658853475.

The spelling of 63218825 in words is "sixty-three million, two hundred eighteen thousand, eight hundred twenty-five".