65816225 has 24 divisors (see below), whose sum is σ = 88119360. Its totient is φ = 48614720.

The previous prime is 65816221. The next prime is 65816227. The reversal of 65816225 is 52261856.

65816225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65816225 - 2² = 65816221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65816221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14702 + ... + 18648.

It is an arithmetic number, because the mean of its divisors is an integer number (3671640).

Almost surely, 2^65816225 is an apocalyptic number.

It is an amenable number.

65816225 is a deficient number, since it is larger than the sum of its proper divisors (22303135).

65816225 is a wasteful number, since it uses less digits than its factorization.

65816225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009 (or 4004 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 65816225 is about 8112.7199507933. The cubic root of 65816225 is about 403.7485630342.

The spelling of 65816225 in words is "sixty-five million, eight hundred sixteen thousand, two hundred twenty-five".