2172166630 has 16 divisors (see below), whose sum is σ = 3915954720. Its totient is φ = 867521152.

The previous prime is 2172166627. The next prime is 2172166637. The reversal of 2172166630 is 366612712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172166637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161395 + ... + 174334.

It is an arithmetic number, because the mean of its divisors is an integer number (244747170).

Almost surely, 2^2172166630 is an apocalyptic number.

2172166630 is a deficient number, since it is larger than the sum of its proper divisors (1743788090).

2172166630 is a wasteful number, since it uses less digits than its factorization.

2172166630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336383.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2172166630 is about 46606.5084510737. The cubic root of 2172166630 is about 1295.0833277230.

The spelling of 2172166630 in words is "two billion, one hundred seventy-two million, one hundred sixty-six thousand, six hundred thirty".