231063509 has 2 divisors, whose sum is σ = 231063510. Its totient is φ = 231063508.

The previous prime is 231063499. The next prime is 231063551. The reversal of 231063509 is 905360132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216737284 + 14326225 = 14722^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 231063509 - 2⁴ = 231063493 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 (231063709) 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, 115531754 + 115531755.

It is an arithmetic number, because the mean of its divisors is an integer number (115531755).

Almost surely, 2^231063509 is an apocalyptic number.

It is an amenable number.

231063509 is a deficient number, since it is larger than the sum of its proper divisors (1).

231063509 is an equidigital number, since it uses as much as digits as its factorization.

231063509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 231063509 is about 15200.7733026975. The cubic root of 231063509 is about 613.6354694115.

The spelling of 231063509 in words is "two hundred thirty-one million, sixty-three thousand, five hundred nine".