2179543212 has 72 divisors (see below), whose sum is σ = 6868872192. Its totient is φ = 566114400.

The previous prime is 2179543151. The next prime is 2179543291. The reversal of 2179543212 is 2123459712.

2179543212 is a `hidden beast` number, since 21 + 79 + 543 + 21 + 2 = 666.

It is a super-2 number, since 2×2179543212² = 9500817225950553888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390364 + ... + 395907.

Almost surely, 2^2179543212 is an apocalyptic number.

2179543212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2179543212 is an abundant number, since it is smaller than the sum of its proper divisors (4689328980).

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

2179543212 is a wasteful number, since it uses less digits than its factorization.

2179543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786299 (or 786294 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2179543212 is about 46685.5782014103. The cubic root of 2179543212 is about 1296.5476866119.

The spelling of 2179543212 in words is "two billion, one hundred seventy-nine million, five hundred forty-three thousand, two hundred twelve".