205384631 has 2 divisors, whose sum is σ = 205384632. Its totient is φ = 205384630.

The previous prime is 205384603. The next prime is 205384639. The reversal of 205384631 is 136483502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205384631 - 2⁶ = 205384567 is a prime.

It is a super-2 number, since 2×205384631² = 84365693302012322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205384639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102692315 + 102692316.

It is an arithmetic number, because the mean of its divisors is an integer number (102692316).

Almost surely, 2^205384631 is an apocalyptic number.

205384631 is a deficient number, since it is larger than the sum of its proper divisors (1).

205384631 is an equidigital number, since it uses as much as digits as its factorization.

205384631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 205384631 is about 14331.2466659394. The cubic root of 205384631 is about 590.0053920794.

The spelling of 205384631 in words is "two hundred five million, three hundred eighty-four thousand, six hundred thirty-one".