171781222082 has 6 divisors (see below), whose sum is σ = 257672712339. Its totient is φ = 85890317970.

The previous prime is 171781222057. The next prime is 171781222087. The reversal of 171781222082 is 280222187171.

It can be written as a sum of positive squares in only one way, i.e., 85890611041 + 85890611041 = 293071^2 + 293071^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293071.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171781222087) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 439607 + ... + 732677.

Almost surely, 2^171781222082 is an apocalyptic number.

171781222082 is a deficient number, since it is larger than the sum of its proper divisors (85891490257).

171781222082 is an frugal number, since it uses more digits than its factorization.

171781222082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586144 (or 293073 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 41.

The spelling of 171781222082 in words is "one hundred seventy-one billion, seven hundred eighty-one million, two hundred twenty-two thousand, eighty-two".