217023307775 has 12 divisors (see below), whose sum is σ = 269166050544. Its totient is φ = 173581776000.

The previous prime is 217023307763. The next prime is 217023307819. The reversal of 217023307775 is 577703320712.

It is not a de Polignac number, because 217023307775 - 2¹⁴ = 217023291391 is a prime.

It is a super-2 number, since 2×217023307775² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801371 + ... + 1037420.

It is an arithmetic number, because the mean of its divisors is an integer number (22430504212).

Almost surely, 2^217023307775 is an apocalyptic number.

217023307775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

217023307775 is a deficient number, since it is larger than the sum of its proper divisors (52142742769).

217023307775 is a wasteful number, since it uses less digits than its factorization.

217023307775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843522 (or 1843517 counting only the distinct ones).

The product of its (nonzero) digits is 432180, while the sum is 44.

The spelling of 217023307775 in words is "two hundred seventeen billion, twenty-three million, three hundred seven thousand, seven hundred seventy-five".