65220225 has 36 divisors (see below), whose sum is σ = 125442864. Its totient is φ = 29813280.

The previous prime is 65220173. The next prime is 65220227. The reversal of 65220225 is 52202256.

65220225 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 65220225 - 2⁸ = 65219969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65220195 and 65220204.

It is not an unprimeable number, because it can be changed into a prime (65220227) 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 35 ways as a sum of consecutive naturals, for example, 5199 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (3484524).

Almost surely, 2^65220225 is an apocalyptic number.

It is an amenable number.

65220225 is a deficient number, since it is larger than the sum of its proper divisors (60222639).

65220225 is a wasteful number, since it uses less digits than its factorization.

65220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17774 (or 17762 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 65220225 is about 8075.9039741691. The cubic root of 65220225 is about 402.5261482697.

The spelling of 65220225 in words is "sixty-five million, two hundred twenty thousand, two hundred twenty-five".