216325225 has 12 divisors (see below), whose sum is σ = 274787100. Its totient is φ = 168838400.

The previous prime is 216325177. The next prime is 216325231. The reversal of 216325225 is 522523612.

It can be written as a sum of positive squares in 6 ways, for example, as 84052224 + 132273001 = 9168^2 + 11501^2 .

It is not a de Polignac number, because 216325225 - 2¹⁵ = 216292457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216325193 and 216325202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104500 + ... + 106549.

It is an arithmetic number, because the mean of its divisors is an integer number (22898925).

Almost surely, 2^216325225 is an apocalyptic number.

216325225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216325225 is a deficient number, since it is larger than the sum of its proper divisors (58461875).

216325225 is a wasteful number, since it uses less digits than its factorization.

216325225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211100 (or 211095 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 216325225 is about 14707.9986741909. The cubic root of 216325225 is about 600.3009832492.

Adding to 216325225 its reverse (522523612), we get a palindrome (738848837).

The spelling of 216325225 in words is "two hundred sixteen million, three hundred twenty-five thousand, two hundred twenty-five".