12216543 has 8 divisors (see below), whose sum is σ = 16433328. Its totient is φ = 8072064.

The previous prime is 12216541. The next prime is 12216559. The reversal of 12216543 is 34561221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12216543 - 2¹ = 12216541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216541) 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, 17680 + ... + 18357.

It is an arithmetic number, because the mean of its divisors is an integer number (2054166).

Almost surely, 2^12216543 is an apocalyptic number.

12216543 is a deficient number, since it is larger than the sum of its proper divisors (4216785).

12216543 is a wasteful number, since it uses less digits than its factorization.

12216543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36153.

The product of its digits is 1440, while the sum is 24.

The square root of 12216543 is about 3495.2171606354. The cubic root of 12216543 is about 230.3117574463.

Adding to 12216543 its reverse (34561221), we get a palindrome (46777764).

The spelling of 12216543 in words is "twelve million, two hundred sixteen thousand, five hundred forty-three".