205140253 has 2 divisors, whose sum is σ = 205140254. Its totient is φ = 205140252.

The previous prime is 205140251. The next prime is 205140269. The reversal of 205140253 is 352041502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113784889 + 91355364 = 10667^2 + 9558^2 .

It is a cyclic number.

It is not a de Polignac number, because 205140253 - 2¹ = 205140251 is a prime.

Together with 205140251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205140251) 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, 102570126 + 102570127.

It is an arithmetic number, because the mean of its divisors is an integer number (102570127).

Almost surely, 2^205140253 is an apocalyptic number.

It is an amenable number.

205140253 is a deficient number, since it is larger than the sum of its proper divisors (1).

205140253 is an equidigital number, since it uses as much as digits as its factorization.

205140253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205140253 is about 14322.7180730474. The cubic root of 205140253 is about 589.7712921843.

Adding to 205140253 its reverse (352041502), we get a palindrome (557181755).

The spelling of 205140253 in words is "two hundred five million, one hundred forty thousand, two hundred fifty-three".