27215451671 has 2 divisors, whose sum is σ = 27215451672. Its totient is φ = 27215451670.

The previous prime is 27215451559. The next prime is 27215451677. The reversal of 27215451671 is 17615451272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27215451671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27215451677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13607725835 + 13607725836.

It is an arithmetic number, because the mean of its divisors is an integer number (13607725836).

Almost surely, 2^27215451671 is an apocalyptic number.

27215451671 is a deficient number, since it is larger than the sum of its proper divisors (1).

27215451671 is an equidigital number, since it uses as much as digits as its factorization.

27215451671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 41.

The spelling of 27215451671 in words is "twenty-seven billion, two hundred fifteen million, four hundred fifty-one thousand, six hundred seventy-one".