12188215 has 32 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 8346240.

The previous prime is 12188213. The next prime is 12188219. The reversal of 12188215 is 51288121.

12188215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12188215 - 2¹ = 12188213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87616 + ... + 87754.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^12188215 is an apocalyptic number.

12188215 is a deficient number, since it is larger than the sum of its proper divisors (4746185).

12188215 is a wasteful number, since it uses less digits than its factorization.

12188215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 1280, while the sum is 28.

The square root of 12188215 is about 3491.1624138673. The cubic root of 12188215 is about 230.1336022773.

It can be divided in two parts, 12188 and 215, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 12188215 in words is "twelve million, one hundred eighty-eight thousand, two hundred fifteen".