12231612 has 36 divisors (see below), whose sum is σ = 31676736. Its totient is φ = 3977280.

The previous prime is 12231599. The next prime is 12231613. The reversal of 12231612 is 21613221.

12231612 is a `hidden beast` number, since 1 + 22 + 31 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12231612² = 299224664237088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231613) 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, 2668 + ... + 5619.

Almost surely, 2^12231612 is an apocalyptic number.

12231612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12231612 is an abundant number, since it is smaller than the sum of its proper divisors (19445124).

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

12231612 is a wasteful number, since it uses less digits than its factorization.

12231612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 8333 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12231612 is about 3497.3721563482. The cubic root of 12231612 is about 230.4064143903.

Adding to 12231612 its reverse (21613221), we get a palindrome (33844833).

The spelling of 12231612 in words is "twelve million, two hundred thirty-one thousand, six hundred twelve".