8212171224 has 16 divisors (see below), whose sum is σ = 20530428120. Its totient is φ = 2737390400.

The previous prime is 8212171217. The next prime is 8212171277. The reversal of 8212171224 is 4221712128.

It is a junction number, because it is equal to n+sod(n) for n = 8212171191 and 8212171200.

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, 171086877 + ... + 171086924.

Almost surely, 2^8212171224 is an apocalyptic number.

It is an amenable number.

8212171224 is an abundant number, since it is smaller than the sum of its proper divisors (12318256896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8212171224 is a wasteful number, since it uses less digits than its factorization.

8212171224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342173810 (or 342173806 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 8212171224 is about 90621.0308041130. The cubic root of 8212171224 is about 2017.5268907078.

The spelling of 8212171224 in words is "eight billion, two hundred twelve million, one hundred seventy-one thousand, two hundred twenty-four".