225520065 has 16 divisors (see below), whose sum is σ = 400924800. Its totient is φ = 120277296.

The previous prime is 225520039. The next prime is 225520073. The reversal of 225520065 is 560025522.

It is not a de Polignac number, because 225520065 - 2⁸ = 225519809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 835125 + ... + 835394.

It is an arithmetic number, because the mean of its divisors is an integer number (25057800).

Almost surely, 2^225520065 is an apocalyptic number.

It is an amenable number.

225520065 is a deficient number, since it is larger than the sum of its proper divisors (175404735).

225520065 is a wasteful number, since it uses less digits than its factorization.

225520065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670533 (or 1670527 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 225520065 is about 15017.3254942416. The cubic root of 225520065 is about 608.6884523590.

Adding to 225520065 its reverse (560025522), we get a palindrome (785545587).

The spelling of 225520065 in words is "two hundred twenty-five million, five hundred twenty thousand, sixty-five".