215207184812 has 12 divisors (see below), whose sum is σ = 388761366336. Its totient is φ = 104132508720.

The previous prime is 215207184811. The next prime is 215207184851. The reversal of 215207184812 is 218481702512.

It is a self number, because there is not a number n which added to its sum of digits gives 215207184812.

It is not an unprimeable number, because it can be changed into a prime (215207184811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867770783 + ... + 867771030.

It is an arithmetic number, because the mean of its divisors is an integer number (32396780528).

Almost surely, 2^215207184812 is an apocalyptic number.

It is an amenable number.

215207184812 is a deficient number, since it is larger than the sum of its proper divisors (173554181524).

215207184812 is a wasteful number, since it uses less digits than its factorization.

215207184812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735541848 (or 1735541846 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 41.

The spelling of 215207184812 in words is "two hundred fifteen billion, two hundred seven million, one hundred eighty-four thousand, eight hundred twelve".