231111607 has 2 divisors, whose sum is σ = 231111608. Its totient is φ = 231111606.

The previous prime is 231111593. The next prime is 231111623. The reversal of 231111607 is 706111132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231111607 - 2¹⁹ = 230587319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231111637) 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, 115555803 + 115555804.

It is an arithmetic number, because the mean of its divisors is an integer number (115555804).

Almost surely, 2^231111607 is an apocalyptic number.

231111607 is a deficient number, since it is larger than the sum of its proper divisors (1).

231111607 is an equidigital number, since it uses as much as digits as its factorization.

231111607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 231111607 is about 15202.3553109378. The cubic root of 231111607 is about 613.6780444179.

Adding to 231111607 its reverse (706111132), we get a palindrome (937222739).

The spelling of 231111607 in words is "two hundred thirty-one million, one hundred eleven thousand, six hundred seven".