206553357 has 12 divisors (see below), whose sum is σ = 298622844. Its totient is φ = 137578560.

The previous prime is 206553343. The next prime is 206553359. The reversal of 206553357 is 753355602.

It can be written as a sum of positive squares in 2 ways, for example, as 103612041 + 102941316 = 10179^2 + 10146^2 .

It is not a de Polignac number, because 206553357 - 2⁶ = 206553293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206553359) 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 11 ways as a sum of consecutive naturals, for example, 913 + ... + 20345.

It is an arithmetic number, because the mean of its divisors is an integer number (24885237).

Almost surely, 2^206553357 is an apocalyptic number.

It is an amenable number.

206553357 is a deficient number, since it is larger than the sum of its proper divisors (92069487).

206553357 is a wasteful number, since it uses less digits than its factorization.

206553357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20620 (or 20617 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 36.

The square root of 206553357 is about 14371.9642707599. The cubic root of 206553357 is about 591.1224032933.

The spelling of 206553357 in words is "two hundred six million, five hundred fifty-three thousand, three hundred fifty-seven".