206646225 has 24 divisors (see below), whose sum is σ = 345989760. Its totient is φ = 108813120.

The previous prime is 206646149. The next prime is 206646229. The reversal of 206646225 is 522646602.

It is not a de Polignac number, because 206646225 - 2¹¹ = 206644177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206646229) 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, 11514 + ... + 23363.

It is an arithmetic number, because the mean of its divisors is an integer number (14416240).

Almost surely, 2^206646225 is an apocalyptic number.

206646225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206646225 is a deficient number, since it is larger than the sum of its proper divisors (139343535).

206646225 is a wasteful number, since it uses less digits than its factorization.

206646225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34969 (or 34964 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 206646225 is about 14375.1947812891. The cubic root of 206646225 is about 591.2109811002.

The spelling of 206646225 in words is "two hundred six million, six hundred forty-six thousand, two hundred twenty-five".