206510231 has 2 divisors, whose sum is σ = 206510232. Its totient is φ = 206510230.

The previous prime is 206510219. The next prime is 206510233. The reversal of 206510231 is 132015602.

206510231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206510231 - 2¹⁰ = 206509207 is a prime.

It is a super-2 number, since 2×206510231² = 85292951015346722, which contains 22 as substring.

Together with 206510233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206510233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103255115 + 103255116.

It is an arithmetic number, because the mean of its divisors is an integer number (103255116).

Almost surely, 2^206510231 is an apocalyptic number.

206510231 is a deficient number, since it is larger than the sum of its proper divisors (1).

206510231 is an equidigital number, since it uses as much as digits as its factorization.

206510231 is an evil number, because the sum of its binary digits is even.

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

The square root of 206510231 is about 14370.4638408090. The cubic root of 206510231 is about 591.0812605437.

Adding to 206510231 its reverse (132015602), we get a palindrome (338525833).

The spelling of 206510231 in words is "two hundred six million, five hundred ten thousand, two hundred thirty-one".