231342539 has 2 divisors, whose sum is σ = 231342540. Its totient is φ = 231342538.

The previous prime is 231342521. The next prime is 231342557. The reversal of 231342539 is 935243132.

It is a balanced prime because it is at equal distance from previous prime (231342521) and next prime (231342557).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231342539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (231342569) 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, 115671269 + 115671270.

It is an arithmetic number, because the mean of its divisors is an integer number (115671270).

Almost surely, 2^231342539 is an apocalyptic number.

231342539 is a deficient number, since it is larger than the sum of its proper divisors (1).

231342539 is an equidigital number, since it uses as much as digits as its factorization.

231342539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 231342539 is about 15209.9486849890. The cubic root of 231342539 is about 613.8823767512.

The spelling of 231342539 in words is "two hundred thirty-one million, three hundred forty-two thousand, five hundred thirty-nine".