231656039 has 2 divisors, whose sum is σ = 231656040. Its totient is φ = 231656038.

The previous prime is 231656017. The next prime is 231656209. The reversal of 231656039 is 930656132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231656039 - 2¹² = 231651943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231656239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115828019 + 115828020.

It is an arithmetic number, because the mean of its divisors is an integer number (115828020).

Almost surely, 2^231656039 is an apocalyptic number.

231656039 is a deficient number, since it is larger than the sum of its proper divisors (1).

231656039 is an equidigital number, since it uses as much as digits as its factorization.

231656039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 231656039 is about 15220.2509506250. The cubic root of 231656039 is about 614.1595490900.

The spelling of 231656039 in words is "two hundred thirty-one million, six hundred fifty-six thousand, thirty-nine".