6531320239 has 2 divisors, whose sum is σ = 6531320240. Its totient is φ = 6531320238.

The previous prime is 6531320209. The next prime is 6531320251. The reversal of 6531320239 is 9320231356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6531320239 - 2⁹ = 6531319727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6531320209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265660119 + 3265660120.

It is an arithmetic number, because the mean of its divisors is an integer number (3265660120).

Almost surely, 2^6531320239 is an apocalyptic number.

6531320239 is a deficient number, since it is larger than the sum of its proper divisors (1).

6531320239 is an equidigital number, since it uses as much as digits as its factorization.

6531320239 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 34.

The square root of 6531320239 is about 80816.5839354770. The cubic root of 6531320239 is about 1869.2482931950.

The spelling of 6531320239 in words is "six billion, five hundred thirty-one million, three hundred twenty thousand, two hundred thirty-nine".