206452321 has 4 divisors (see below), whose sum is σ = 208772100. Its totient is φ = 204132544.

The previous prime is 206452319. The next prime is 206452333. The reversal of 206452321 is 123254602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13242321 + 193210000 = 3639^2 + 13900^2 .

It is a cyclic number.

It is not a de Polignac number, because 206452321 - 2¹ = 206452319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206452381) 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 3 ways as a sum of consecutive naturals, for example, 1159756 + ... + 1159933.

It is an arithmetic number, because the mean of its divisors is an integer number (52193025).

Almost surely, 2^206452321 is an apocalyptic number.

It is an amenable number.

206452321 is a deficient number, since it is larger than the sum of its proper divisors (2319779).

206452321 is an equidigital number, since it uses as much as digits as its factorization.

206452321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319778.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 206452321 is about 14368.4488028458. The cubic root of 206452321 is about 591.0260046601.

The spelling of 206452321 in words is "two hundred six million, four hundred fifty-two thousand, three hundred twenty-one".