2216705217172 has 12 divisors (see below), whose sum is σ = 3907142290240. Its totient is φ = 1100378848536.

The previous prime is 2216705217161. The next prime is 2216705217193. The reversal of 2216705217172 is 2717125076122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1993439388 + ... + 1993440499.

Almost surely, 2^{2216705217172} is an apocalyptic number.

It is an amenable number.

2216705217172 is a deficient number, since it is larger than the sum of its proper divisors (1690437073068).

2216705217172 is a wasteful number, since it uses less digits than its factorization.

2216705217172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986880030 (or 3986880028 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 2216705217172 in words is "two trillion, two hundred sixteen billion, seven hundred five million, two hundred seventeen thousand, one hundred seventy-two".