12215236 has 24 divisors (see below), whose sum is σ = 23645664. Its totient is φ = 5474880.

The previous prime is 12215221. The next prime is 12215237. The reversal of 12215236 is 63251221.

12215236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311 + ... + 5113.

It is an arithmetic number, because the mean of its divisors is an integer number (985236).

Almost surely, 2^12215236 is an apocalyptic number.

It is an amenable number.

12215236 is a deficient number, since it is larger than the sum of its proper divisors (11430428).

12215236 is a wasteful number, since it uses less digits than its factorization.

12215236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891 (or 3889 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 12215236 is about 3495.0301858496. The cubic root of 12215236 is about 230.3035437697.

Adding to 12215236 its reverse (63251221), we get a palindrome (75466457).

The spelling of 12215236 in words is "twelve million, two hundred fifteen thousand, two hundred thirty-six".