27804317531 has 2 divisors, whose sum is σ = 27804317532. Its totient is φ = 27804317530.

The previous prime is 27804317483. The next prime is 27804317537. The reversal of 27804317531 is 13571340872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27804317531 - 2⁶ = 27804317467 is a prime.

It is a super-2 number, since 2×27804317531² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27804317537) 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, 13902158765 + 13902158766.

It is an arithmetic number, because the mean of its divisors is an integer number (13902158766).

Almost surely, 2^27804317531 is an apocalyptic number.

27804317531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27804317531 is an equidigital number, since it uses as much as digits as its factorization.

27804317531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 27804317531 in words is "twenty-seven billion, eight hundred four million, three hundred seventeen thousand, five hundred thirty-one".