205610231 has 2 divisors, whose sum is σ = 205610232. Its totient is φ = 205610230.

The previous prime is 205610227. The next prime is 205610243. The reversal of 205610231 is 132016502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205610231 - 2² = 205610227 is a prime.

It is a super-2 number, since 2×205610231² = 84551134183746722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205610201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102805115 + 102805116.

It is an arithmetic number, because the mean of its divisors is an integer number (102805116).

Almost surely, 2^205610231 is an apocalyptic number.

205610231 is a deficient number, since it is larger than the sum of its proper divisors (1).

205610231 is an equidigital number, since it uses as much as digits as its factorization.

205610231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 205610231 is about 14339.1154190208. The cubic root of 205610231 is about 590.2213389593.

Adding to 205610231 its reverse (132016502), we get a palindrome (337626733).

The spelling of 205610231 in words is "two hundred five million, six hundred ten thousand, two hundred thirty-one".