205030361 has 2 divisors, whose sum is σ = 205030362. Its totient is φ = 205030360.

The previous prime is 205030351. The next prime is 205030411. The reversal of 205030361 is 163030502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189475225 + 15555136 = 13765^2 + 3944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205030361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205030351) 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, 102515180 + 102515181.

It is an arithmetic number, because the mean of its divisors is an integer number (102515181).

Almost surely, 2^205030361 is an apocalyptic number.

It is an amenable number.

205030361 is a deficient number, since it is larger than the sum of its proper divisors (1).

205030361 is an equidigital number, since it uses as much as digits as its factorization.

205030361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 205030361 is about 14318.8812761333. The cubic root of 205030361 is about 589.6659614455.

Adding to 205030361 its reverse (163030502), we get a palindrome (368060863).

The spelling of 205030361 in words is "two hundred five million, thirty thousand, three hundred sixty-one".