47817081217 has 2 divisors, whose sum is σ = 47817081218. Its totient is φ = 47817081216.

The previous prime is 47817081203. The next prime is 47817081223. The reversal of 47817081217 is 71218071874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46105107841 + 1711973376 = 214721^2 + 41376^2 .

It is a cyclic number.

It is not a de Polignac number, because 47817081217 - 2²⁷ = 47682863489 is a prime.

It is a super-2 number, since 2×47817081217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47817081227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23908540608 + 23908540609.

It is an arithmetic number, because the mean of its divisors is an integer number (23908540609).

Almost surely, 2^47817081217 is an apocalyptic number.

It is an amenable number.

47817081217 is a deficient number, since it is larger than the sum of its proper divisors (1).

47817081217 is an equidigital number, since it uses as much as digits as its factorization.

47817081217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175616, while the sum is 46.

The spelling of 47817081217 in words is "forty-seven billion, eight hundred seventeen million, eighty-one thousand, two hundred seventeen".