205610255 has 4 divisors (see below), whose sum is σ = 246732312. Its totient is φ = 164488200.

The previous prime is 205610243. The next prime is 205610287. The reversal of 205610255 is 552016502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552016502 = 2 ⋅276008251.

It is not a de Polignac number, because 205610255 - 2¹⁶ = 205544719 is a prime.

It is a super-2 number, since 2×205610255² = 84551153922330050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20561021 + ... + 20561030.

It is an arithmetic number, because the mean of its divisors is an integer number (61683078).

Almost surely, 2^205610255 is an apocalyptic number.

205610255 is a deficient number, since it is larger than the sum of its proper divisors (41122057).

205610255 is an equidigital number, since it uses as much as digits as its factorization.

205610255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41122056.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205610255 is about 14339.1162558925. The cubic root of 205610255 is about 590.2213619240.

Adding to 205610255 its reverse (552016502), we get a palindrome (757626757).

The spelling of 205610255 in words is "two hundred five million, six hundred ten thousand, two hundred fifty-five".