206409325 has 24 divisors (see below), whose sum is σ = 274756968. Its totient is φ = 153262080.

The previous prime is 206409319. The next prime is 206409361. The reversal of 206409325 is 523904602.

It can be written as a sum of positive squares in 12 ways, for example, as 79103236 + 127306089 = 8894^2 + 11283^2 .

It is not a de Polignac number, because 206409325 - 2²⁷ = 72191597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27699 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (11448207).

Almost surely, 2^206409325 is an apocalyptic number.

206409325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206409325 is a deficient number, since it is larger than the sum of its proper divisors (68347643).

206409325 is a wasteful number, since it uses less digits than its factorization.

206409325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753 (or 6748 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 206409325 is about 14366.9525300253. The cubic root of 206409325 is about 590.9849725575.

The spelling of 206409325 in words is "two hundred six million, four hundred nine thousand, three hundred twenty-five".