12215316 has 24 divisors (see below), whose sum is σ = 30179520. Its totient is φ = 3832192.

The previous prime is 12215297. The next prime is 12215317. The reversal of 12215316 is 61351221.

It is a junction number, because it is equal to n+sod(n) for n = 12215292 and 12215301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215317) 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, 29736 + ... + 30143.

It is an arithmetic number, because the mean of its divisors is an integer number (1257480).

Almost surely, 2^12215316 is an apocalyptic number.

It is an amenable number.

12215316 is an abundant number, since it is smaller than the sum of its proper divisors (17964204).

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

12215316 is a wasteful number, since it uses less digits than its factorization.

12215316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59903 (or 59901 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 12215316 is about 3495.0416306533. The cubic root of 12215316 is about 230.3040465364.

Adding to 12215316 its reverse (61351221), we get a palindrome (73566537).

The spelling of 12215316 in words is "twelve million, two hundred fifteen thousand, three hundred sixteen".