217946540071 has 8 divisors (see below), whose sum is σ = 234717005600. Its totient is φ = 201176838432.

The previous prime is 217946540003. The next prime is 217946540083. The reversal of 217946540071 is 170045649712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217946540071 - 2²⁹ = 217409669159 is a prime.

It is a super-3 number, since 3×217946540071³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217946543071) 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 in 7 ways as a sum of consecutive naturals, for example, 492121 + ... + 823453.

It is an arithmetic number, because the mean of its divisors is an integer number (29339625700).

Almost surely, 2^217946540071 is an apocalyptic number.

217946540071 is the 269535-th hex number.

217946540071 is a deficient number, since it is larger than the sum of its proper divisors (16770465529).

217946540071 is a wasteful number, since it uses less digits than its factorization.

217946540071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381945.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 217946540071 in words is "two hundred seventeen billion, nine hundred forty-six million, five hundred forty thousand, seventy-one".