206140331 has 2 divisors, whose sum is σ = 206140332. Its totient is φ = 206140330.

The previous prime is 206140321. The next prime is 206140343. The reversal of 206140331 is 133041602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206140331 - 2²² = 201946027 is a prime.

It is a super-2 number, since 2×206140331² = 84987672129579122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206140321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103070165 + 103070166.

It is an arithmetic number, because the mean of its divisors is an integer number (103070166).

Almost surely, 2^206140331 is an apocalyptic number.

206140331 is a deficient number, since it is larger than the sum of its proper divisors (1).

206140331 is an equidigital number, since it uses as much as digits as its factorization.

206140331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 206140331 is about 14357.5879241605. The cubic root of 206140331 is about 590.7281357774.

Adding to 206140331 its reverse (133041602), we get a palindrome (339181933).

The spelling of 206140331 in words is "two hundred six million, one hundred forty thousand, three hundred thirty-one".