205234261 has 2 divisors, whose sum is σ = 205234262. Its totient is φ = 205234260.

The previous prime is 205234243. The next prime is 205234279. The reversal of 205234261 is 162432502.

It is a balanced prime because it is at equal distance from previous prime (205234243) and next prime (205234279).

It can be written as a sum of positive squares in only one way, i.e., 132388036 + 72846225 = 11506^2 + 8535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205234261 is a prime.

It is a super-2 number, since 2×205234261² = 84242203776432242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205234201) 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, 102617130 + 102617131.

It is an arithmetic number, because the mean of its divisors is an integer number (102617131).

Almost surely, 2^205234261 is an apocalyptic number.

It is an amenable number.

205234261 is a deficient number, since it is larger than the sum of its proper divisors (1).

205234261 is an equidigital number, since it uses as much as digits as its factorization.

205234261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 205234261 is about 14325.9994764763. Note that the first 3 decimals coincide. The cubic root of 205234261 is about 589.8613683669.

Adding to 205234261 its reverse (162432502), we get a palindrome (367666763).

The spelling of 205234261 in words is "two hundred five million, two hundred thirty-four thousand, two hundred sixty-one".