206523133 has 2 divisors, whose sum is σ = 206523134. Its totient is φ = 206523132.

The previous prime is 206523131. The next prime is 206523151. The reversal of 206523133 is 331325602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156425049 + 50098084 = 12507^2 + 7078^2 .

It is a cyclic number.

It is not a de Polignac number, because 206523133 - 2¹ = 206523131 is a prime.

Together with 206523131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 206523098 and 206523107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206523131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103261566 + 103261567.

It is an arithmetic number, because the mean of its divisors is an integer number (103261567).

Almost surely, 2^206523133 is an apocalyptic number.

It is an amenable number.

206523133 is a deficient number, since it is larger than the sum of its proper divisors (1).

206523133 is an equidigital number, since it uses as much as digits as its factorization.

206523133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 206523133 is about 14370.9127406717. The cubic root of 206523133 is about 591.0935698153.

Adding to 206523133 its reverse (331325602), we get a palindrome (537848735).

The spelling of 206523133 in words is "two hundred six million, five hundred twenty-three thousand, one hundred thirty-three".