27215998291 has 2 divisors, whose sum is σ = 27215998292. Its totient is φ = 27215998290.

The previous prime is 27215998289. The next prime is 27215998331. The reversal of 27215998291 is 19289951272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27215998291 - 2¹ = 27215998289 is a prime.

Together with 27215998289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27215998231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13607999145 + 13607999146.

It is an arithmetic number, because the mean of its divisors is an integer number (13607999146).

Almost surely, 2^27215998291 is an apocalyptic number.

27215998291 is a deficient number, since it is larger than the sum of its proper divisors (1).

27215998291 is an equidigital number, since it uses as much as digits as its factorization.

27215998291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 55.

The spelling of 27215998291 in words is "twenty-seven billion, two hundred fifteen million, nine hundred ninety-eight thousand, two hundred ninety-one".