12311656 has 16 divisors (see below), whose sum is σ = 26382240. Its totient is φ = 5276400.

The previous prime is 12311653. The next prime is 12311657. The reversal of 12311656 is 65611321.

It is a self number, because there is not a number n which added to its sum of digits gives 12311656.

It is not an unprimeable number, because it can be changed into a prime (12311653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109870 + ... + 109981.

It is an arithmetic number, because the mean of its divisors is an integer number (1648890).

Almost surely, 2^12311656 is an apocalyptic number.

It is an amenable number.

12311656 is an abundant number, since it is smaller than the sum of its proper divisors (14070584).

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

12311656 is a wasteful number, since it uses less digits than its factorization.

12311656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219864 (or 219860 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 12311656 is about 3508.7969448231. The cubic root of 12311656 is about 230.9079172971.

Adding to 12311656 its reverse (65611321), we get a palindrome (77922977).

The spelling of 12311656 in words is "twelve million, three hundred eleven thousand, six hundred fifty-six".