206500225 has 6 divisors (see below), whose sum is σ = 256060310. Its totient is φ = 165200160.

The previous prime is 206500199. The next prime is 206500277. The reversal of 206500225 is 522005602.

It can be written as a sum of positive squares in 3 ways, for example, as 43784689 + 162715536 = 6617^2 + 12756^2 .

It is not a de Polignac number, because 206500225 - 2¹⁷ = 206369153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206500196 and 206500205.

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 5 ways as a sum of consecutive naturals, for example, 4129980 + ... + 4130029.

Almost surely, 2^206500225 is an apocalyptic number.

206500225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206500225 is a deficient number, since it is larger than the sum of its proper divisors (49560085).

206500225 is an equidigital number, since it uses as much as digits as its factorization.

206500225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260019 (or 8260014 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 206500225 is about 14370.1156919490. The cubic root of 206500225 is about 591.0717138744.

Adding to 206500225 its reverse (522005602), we get a palindrome (728505827).

The spelling of 206500225 in words is "two hundred six million, five hundred thousand, two hundred twenty-five".