208535513 has 2 divisors, whose sum is σ = 208535514. Its totient is φ = 208535512.

The previous prime is 208535497. The next prime is 208535531. The reversal of 208535513 is 315535802.

Together with next prime (208535531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131148304 + 77387209 = 11452^2 + 8797^2 .

It is a cyclic number.

It is not a de Polignac number, because 208535513 - 2⁴ = 208535497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 208535513.

It is not a weakly prime, because it can be changed into another prime (208535533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104267756 + 104267757.

It is an arithmetic number, because the mean of its divisors is an integer number (104267757).

Almost surely, 2^208535513 is an apocalyptic number.

It is an amenable number.

208535513 is a deficient number, since it is larger than the sum of its proper divisors (1).

208535513 is an equidigital number, since it uses as much as digits as its factorization.

208535513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 208535513 is about 14440.7587404540. The cubic root of 208535513 is about 593.0072571478.

The spelling of 208535513 in words is "two hundred eight million, five hundred thirty-five thousand, five hundred thirteen".