231140207 has 2 divisors, whose sum is σ = 231140208. Its totient is φ = 231140206.

The previous prime is 231140197. The next prime is 231140227. The reversal of 231140207 is 702041132.

It is an a-pointer prime, because the next prime (231140227) can be obtained adding 231140207 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231140207 - 2¹⁶ = 231074671 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231140227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115570103 + 115570104.

It is an arithmetic number, because the mean of its divisors is an integer number (115570104).

Almost surely, 2^231140207 is an apocalyptic number.

231140207 is a deficient number, since it is larger than the sum of its proper divisors (1).

231140207 is an equidigital number, since it uses as much as digits as its factorization.

231140207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 231140207 is about 15203.2959255551. The cubic root of 231140207 is about 613.7033575388.

Adding to 231140207 its reverse (702041132), we get a palindrome (933181339).

The spelling of 231140207 in words is "two hundred thirty-one million, one hundred forty thousand, two hundred seven".