206702231 has 2 divisors, whose sum is σ = 206702232. Its totient is φ = 206702230.

The previous prime is 206702213. The next prime is 206702261. The reversal of 206702231 is 132207602.

Together with previous prime (206702213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206702231 - 2²⁶ = 139593367 is a prime.

It is a super-2 number, since 2×206702231² = 85451624600754722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206702197 and 206702206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206702261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103351115 + 103351116.

It is an arithmetic number, because the mean of its divisors is an integer number (103351116).

Almost surely, 2^206702231 is an apocalyptic number.

206702231 is a deficient number, since it is larger than the sum of its proper divisors (1).

206702231 is an equidigital number, since it uses as much as digits as its factorization.

206702231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 206702231 is about 14377.1426577050. The cubic root of 206702231 is about 591.2643869816.

Adding to 206702231 its reverse (132207602), we get a palindrome (338909833).

The spelling of 206702231 in words is "two hundred six million, seven hundred two thousand, two hundred thirty-one".