12331616 has 48 divisors (see below), whose sum is σ = 27025488. Its totient is φ = 5491200.

The previous prime is 12331607. The next prime is 12331621. The reversal of 12331616 is 61613321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12331591 and 12331600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18326 + ... + 18986.

It is an arithmetic number, because the mean of its divisors is an integer number (563031).

Almost surely, 2^12331616 is an apocalyptic number.

12331616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12331616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13512744).

12331616 is an abundant number, since it is smaller than the sum of its proper divisors (14693872).

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

12331616 is a wasteful number, since it uses less digits than its factorization.

12331616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 727 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 12331616 is about 3511.6400726726. The cubic root of 12331616 is about 231.0326347076.

Adding to 12331616 its reverse (61613321), we get a palindrome (73944937).

The spelling of 12331616 in words is "twelve million, three hundred thirty-one thousand, six hundred sixteen".