2172023202217 has 48 divisors (see below), whose sum is σ = 2533608504000. Its totient is φ = 1855391408640.

The previous prime is 2172023202191. The next prime is 2172023202299. The reversal of 2172023202217 is 7122023202712.

It is a happy number.

It is not a de Polignac number, because 2172023202217 - 2²³ = 2172014813609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2172023202917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 411911493 + ... + 411916765.

It is an arithmetic number, because the mean of its divisors is an integer number (52783510500).

Almost surely, 2^{2172023202217} is an apocalyptic number.

It is an amenable number.

2172023202217 is a deficient number, since it is larger than the sum of its proper divisors (361585301783).

2172023202217 is a wasteful number, since it uses less digits than its factorization.

2172023202217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742 (or 6731 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

Adding to 2172023202217 its reverse (7122023202712), we get a palindrome (9294046404929).

The spelling of 2172023202217 in words is "two trillion, one hundred seventy-two billion, twenty-three million, two hundred two thousand, two hundred seventeen".