27312009251 has 2 divisors, whose sum is σ = 27312009252. Its totient is φ = 27312009250.

The previous prime is 27312009163. The next prime is 27312009253. The reversal of 27312009251 is 15290021372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27312009251 - 2¹⁴ = 27311992867 is a prime.

Together with 27312009253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27312009253) 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, 13656004625 + 13656004626.

It is an arithmetic number, because the mean of its divisors is an integer number (13656004626).

Almost surely, 2^27312009251 is an apocalyptic number.

27312009251 is a deficient number, since it is larger than the sum of its proper divisors (1).

27312009251 is an equidigital number, since it uses as much as digits as its factorization.

27312009251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 27312009251 in words is "twenty-seven billion, three hundred twelve million, nine thousand, two hundred fifty-one".