217670542327 has 16 divisors (see below), whose sum is σ = 263616768000. Its totient is φ = 175568735520.

The previous prime is 217670542303. The next prime is 217670542363. The reversal of 217670542327 is 723245076712.

It is a cyclic number.

It is not a de Polignac number, because 217670542327 - 2²³ = 217662153719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217670548327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5472199 + ... + 5511832.

It is an arithmetic number, because the mean of its divisors is an integer number (16476048000).

Almost surely, 2^217670542327 is an apocalyptic number.

217670542327 is a deficient number, since it is larger than the sum of its proper divisors (45946225673).

217670542327 is a wasteful number, since it uses less digits than its factorization.

217670542327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10984206.

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 217670542327 in words is "two hundred seventeen billion, six hundred seventy million, five hundred forty-two thousand, three hundred twenty-seven".