206387231 has 2 divisors, whose sum is σ = 206387232. Its totient is φ = 206387230.

The previous prime is 206387227. The next prime is 206387239. The reversal of 206387231 is 132783602.

It is a happy number.

206387231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206387231 - 2² = 206387227 is a prime.

It is a super-2 number, since 2×206387231² = 85191378239694722, 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 (206387239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103193615 + 103193616.

It is an arithmetic number, because the mean of its divisors is an integer number (103193616).

Almost surely, 2^206387231 is an apocalyptic number.

206387231 is a deficient number, since it is larger than the sum of its proper divisors (1).

206387231 is an equidigital number, since it uses as much as digits as its factorization.

206387231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 206387231 is about 14366.1835920331. The cubic root of 206387231 is about 590.9638855130.

The spelling of 206387231 in words is "two hundred six million, three hundred eighty-seven thousand, two hundred thirty-one".