171222782042225 has 96 divisors (see below), whose sum is σ = 235184197248000. Its totient is φ = 123072542208000.

The previous prime is 171222782042203. The next prime is 171222782042261. The reversal of 171222782042225 is 522240287222171.

It is not a de Polignac number, because 171222782042225 - 2⁶ = 171222782042161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171222782042225.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 904893176 + ... + 905082374.

It is an arithmetic number, because the mean of its divisors is an integer number (2449835388000).

Almost surely, 2^{171222782042225} is an apocalyptic number.

It is an amenable number.

171222782042225 is a deficient number, since it is larger than the sum of its proper divisors (63961415205775).

171222782042225 is a wasteful number, since it uses less digits than its factorization.

171222782042225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190083 (or 190078 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 47.

The spelling of 171222782042225 in words is "one hundred seventy-one trillion, two hundred twenty-two billion, seven hundred eighty-two million, forty-two thousand, two hundred twenty-five".