87315211632217 has 2 divisors, whose sum is σ = 87315211632218. Its totient is φ = 87315211632216.

The previous prime is 87315211632199. The next prime is 87315211632227. The reversal of 87315211632217 is 71223611251378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83739410053776 + 3575801578441 = 9150924^2 + 1890979^2 .

It is a cyclic number.

It is not a de Polignac number, because 87315211632217 - 2²⁷ = 87315077414489 is a prime.

It is not a weakly prime, because it can be changed into another prime (87315211632227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43657605816108 + 43657605816109.

It is an arithmetic number, because the mean of its divisors is an integer number (43657605816109).

Almost surely, 2^{87315211632217} is an apocalyptic number.

It is an amenable number.

87315211632217 is a deficient number, since it is larger than the sum of its proper divisors (1).

87315211632217 is an equidigital number, since it uses as much as digits as its factorization.

87315211632217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 49.

The spelling of 87315211632217 in words is "eighty-seven trillion, three hundred fifteen billion, two hundred eleven million, six hundred thirty-two thousand, two hundred seventeen".