217730142375 has 32 divisors (see below), whose sum is σ = 363446066880. Its totient is φ = 115756361600.

The previous prime is 217730142373. The next prime is 217730142407. The reversal of 217730142375 is 573241037712.

217730142375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217730142375 - 2¹ = 217730142373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217730142373) 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 31 ways as a sum of consecutive naturals, for example, 796920 + ... + 1034669.

It is an arithmetic number, because the mean of its divisors is an integer number (11357689590).

Almost surely, 2^217730142375 is an apocalyptic number.

217730142375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

217730142375 is a deficient number, since it is larger than the sum of its proper divisors (145715924505).

217730142375 is a wasteful number, since it uses less digits than its factorization.

217730142375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831924 (or 1831914 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 217730142375 in words is "two hundred seventeen billion, seven hundred thirty million, one hundred forty-two thousand, three hundred seventy-five".