205743253 has 2 divisors, whose sum is σ = 205743254. Its totient is φ = 205743252.

The previous prime is 205743247. The next prime is 205743269. The reversal of 205743253 is 352347502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109369764 + 96373489 = 10458^2 + 9817^2 .

It is a cyclic number.

It is not a de Polignac number, because 205743253 - 2⁹ = 205742741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205743053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102871626 + 102871627.

It is an arithmetic number, because the mean of its divisors is an integer number (102871627).

Almost surely, 2^205743253 is an apocalyptic number.

It is an amenable number.

205743253 is a deficient number, since it is larger than the sum of its proper divisors (1).

205743253 is an equidigital number, since it uses as much as digits as its factorization.

205743253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 205743253 is about 14343.7531002175. The cubic root of 205743253 is about 590.3485951066.

The spelling of 205743253 in words is "two hundred five million, seven hundred forty-three thousand, two hundred fifty-three".