2172179228 has 24 divisors (see below), whose sum is σ = 4023853680. Its totient is φ = 1024248960.

The previous prime is 2172179209. The next prime is 2172179263. The reversal of 2172179228 is 8229712712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212753 + ... + 222728.

It is an arithmetic number, because the mean of its divisors is an integer number (167660570).

Almost surely, 2^2172179228 is an apocalyptic number.

It is an amenable number.

2172179228 is a deficient number, since it is larger than the sum of its proper divisors (1851674452).

2172179228 is a wasteful number, since it uses less digits than its factorization.

2172179228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435557 (or 435555 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 2172179228 is about 46606.6436036752. The cubic root of 2172179228 is about 1295.0858314333.

The spelling of 2172179228 in words is "two billion, one hundred seventy-two million, one hundred seventy-nine thousand, two hundred twenty-eight".