2205405572171 has 16 divisors (see below), whose sum is σ = 2234966580000. Its totient is φ = 2176076195328.

The previous prime is 2205405572107. The next prime is 2205405572173. The reversal of 2205405572171 is 1712755045022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2205405572171 - 2⁶ = 2205405572107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2205405572173) 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 15 ways as a sum of consecutive naturals, for example, 18815555 + ... + 18932403.

It is an arithmetic number, because the mean of its divisors is an integer number (139685411250).

Almost surely, 2^{2205405572171} is an apocalyptic number.

2205405572171 is a deficient number, since it is larger than the sum of its proper divisors (29561007829).

2205405572171 is a wasteful number, since it uses less digits than its factorization.

2205405572171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117838.

The product of its (nonzero) digits is 196000, while the sum is 41.

The spelling of 2205405572171 in words is "two trillion, two hundred five billion, four hundred five million, five hundred seventy-two thousand, one hundred seventy-one".