12231556 has 12 divisors (see below), whose sum is σ = 21542668. Its totient is φ = 6076512.

The previous prime is 12231547. The next prime is 12231563. The reversal of 12231556 is 65513221.

It can be written as a sum of positive squares in 2 ways, for example, as 6150400 + 6081156 = 2480^2 + 2466^2 .

It is a super-2 number, since 2×12231556² = 299221924362272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12231556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9111 + ... + 10366.

Almost surely, 2^12231556 is an apocalyptic number.

It is an amenable number.

12231556 is a deficient number, since it is larger than the sum of its proper divisors (9311112).

12231556 is a wasteful number, since it uses less digits than its factorization.

12231556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19638 (or 19636 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 12231556 is about 3497.3641503281. The cubic root of 12231556 is about 230.4060627665.

Adding to 12231556 its reverse (65513221), we get a palindrome (77744777).

The spelling of 12231556 in words is "twelve million, two hundred thirty-one thousand, five hundred fifty-six".