205140263 has 8 divisors (see below), whose sum is σ = 209819808. Its totient is φ = 200490784.

The previous prime is 205140253. The next prime is 205140269. The reversal of 205140263 is 362041502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205140263 - 2¹² = 205136167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205140269) 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 in 7 ways as a sum of consecutive naturals, for example, 6581 + ... + 21297.

It is an arithmetic number, because the mean of its divisors is an integer number (26227476).

Almost surely, 2^205140263 is an apocalyptic number.

205140263 is a deficient number, since it is larger than the sum of its proper divisors (4679545).

205140263 is a wasteful number, since it uses less digits than its factorization.

205140263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15033.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 205140263 is about 14322.7184221432. The cubic root of 205140263 is about 589.7713017676.

Adding to 205140263 its reverse (362041502), we get a palindrome (567181765).

The spelling of 205140263 in words is "two hundred five million, one hundred forty thousand, two hundred sixty-three".