12216735 has 12 divisors (see below), whose sum is σ = 21175752. Its totient is φ = 6515568.

The previous prime is 12216731. The next prime is 12216751. The reversal of 12216735 is 53761221.

It is a happy number.

It is not a de Polignac number, because 12216735 - 2² = 12216731 is a prime.

It is a super-2 number, since 2×12216735² = 298497228120450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12216699 and 12216708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135697 + ... + 135786.

It is an arithmetic number, because the mean of its divisors is an integer number (1764646).

Almost surely, 2^12216735 is an apocalyptic number.

12216735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12216735 is a deficient number, since it is larger than the sum of its proper divisors (8959017).

12216735 is a wasteful number, since it uses less digits than its factorization.

12216735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271494 (or 271491 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12216735 is about 3495.2446266320. The cubic root of 12216735 is about 230.3129639968.

Adding to 12216735 its reverse (53761221), we get a palindrome (65977956).

The spelling of 12216735 in words is "twelve million, two hundred sixteen thousand, seven hundred thirty-five".