217054057071 has 8 divisors (see below), whose sum is σ = 291517858224. Its totient is φ = 143646480320.

The previous prime is 217054057063. The next prime is 217054057109. The reversal of 217054057071 is 170750450712.

It is a happy number.

217054057071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 217054057071 - 2³ = 217054057063 is a prime.

It is a super-2 number, since 2×217054057071² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217054053071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264055620 + ... + 264056441.

It is an arithmetic number, because the mean of its divisors is an integer number (36439732278).

Almost surely, 2^217054057071 is an apocalyptic number.

217054057071 is a deficient number, since it is larger than the sum of its proper divisors (74463801153).

217054057071 is a wasteful number, since it uses less digits than its factorization.

217054057071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528112201.

The product of its (nonzero) digits is 68600, while the sum is 39.

The spelling of 217054057071 in words is "two hundred seventeen billion, fifty-four million, fifty-seven thousand, seventy-one".