12215893172 has 12 divisors (see below), whose sum is σ = 24431786400. Its totient is φ = 5235382776.

The previous prime is 12215893163. The next prime is 12215893189. The reversal of 12215893172 is 27139851221.

12215893172 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218140922 + ... + 218140977.

It is an arithmetic number, because the mean of its divisors is an integer number (2035982200).

Almost surely, 2^12215893172 is an apocalyptic number.

It is an amenable number.

12215893172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12215893172 is a wasteful number, since it uses less digits than its factorization.

12215893172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436281910 (or 436281908 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The spelling of 12215893172 in words is "twelve billion, two hundred fifteen million, eight hundred ninety-three thousand, one hundred seventy-two".