206553241 has 2 divisors, whose sum is σ = 206553242. Its totient is φ = 206553240.

The previous prime is 206553239. The next prime is 206553253. The reversal of 206553241 is 142355602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205062400 + 1490841 = 14320^2 + 1221^2 .

It is a cyclic number.

It is not a de Polignac number, because 206553241 - 2¹ = 206553239 is a prime.

Together with 206553239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (206553211) 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 as a sum of consecutive naturals, namely, 103276620 + 103276621.

It is an arithmetic number, because the mean of its divisors is an integer number (103276621).

Almost surely, 2^206553241 is an apocalyptic number.

It is an amenable number.

206553241 is a deficient number, since it is larger than the sum of its proper divisors (1).

206553241 is an equidigital number, since it uses as much as digits as its factorization.

206553241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 206553241 is about 14371.9602351245. The cubic root of 206553241 is about 591.1222926355.

The spelling of 206553241 in words is "two hundred six million, five hundred fifty-three thousand, two hundred forty-one".