231113539 has 2 divisors, whose sum is σ = 231113540. Its totient is φ = 231113538.

The previous prime is 231113537. The next prime is 231113551. The reversal of 231113539 is 935311132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231113539 - 2¹ = 231113537 is a prime.

Together with 231113537, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231113537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115556769 + 115556770.

It is an arithmetic number, because the mean of its divisors is an integer number (115556770).

Almost surely, 2^231113539 is an apocalyptic number.

231113539 is a deficient number, since it is larger than the sum of its proper divisors (1).

231113539 is an equidigital number, since it uses as much as digits as its factorization.

231113539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 28.

The square root of 231113539 is about 15202.4188535904. The cubic root of 231113539 is about 613.6797544470.

The spelling of 231113539 in words is "two hundred thirty-one million, one hundred thirteen thousand, five hundred thirty-nine".