205335139 has 2 divisors, whose sum is σ = 205335140. Its totient is φ = 205335138.

The previous prime is 205335131. The next prime is 205335157. The reversal of 205335139 is 931533502.

205335139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205335139 - 2³ = 205335131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205335139.

It is not a weakly prime, because it can be changed into another prime (205335131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102667569 + 102667570.

It is an arithmetic number, because the mean of its divisors is an integer number (102667570).

Almost surely, 2^205335139 is an apocalyptic number.

205335139 is a deficient number, since it is larger than the sum of its proper divisors (1).

205335139 is an equidigital number, since it uses as much as digits as its factorization.

205335139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 205335139 is about 14329.5198454100. The cubic root of 205335139 is about 589.9579966267.

The spelling of 205335139 in words is "two hundred five million, three hundred thirty-five thousand, one hundred thirty-nine".