206355601 has 2 divisors, whose sum is σ = 206355602. Its totient is φ = 206355600.

The previous prime is 206355593. The next prime is 206355629. The reversal of 206355601 is 106553602.

It is an a-pointer prime, because the next prime (206355629) can be obtained adding 206355601 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120978001 + 85377600 = 10999^2 + 9240^2 .

It is a cyclic number.

It is not a de Polignac number, because 206355601 - 2³ = 206355593 is a prime.

It is a super-3 number, since 3×206355601³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206355601.

It is not a weakly prime, because it can be changed into another prime (206355631) 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, 103177800 + 103177801.

It is an arithmetic number, because the mean of its divisors is an integer number (103177801).

Almost surely, 2^206355601 is an apocalyptic number.

It is an amenable number.

206355601 is a deficient number, since it is larger than the sum of its proper divisors (1).

206355601 is an equidigital number, since it uses as much as digits as its factorization.

206355601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 206355601 is about 14365.0827007713. The cubic root of 206355601 is about 590.9336944613.

The spelling of 206355601 in words is "two hundred six million, three hundred fifty-five thousand, six hundred one".