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12231666 = 232679537
BaseRepresentation
bin101110101010…
…001111110010
3212000102200200
4232222033302
511112403131
61114100030
7205652556
oct56521762
925012620
1012231666
1169a4917
12411a616
1326c3595
1418a5866
1511192e6
hexbaa3f2

12231666 has 12 divisors (see below), whose sum is σ = 26501982. Its totient is φ = 4077216.

The previous prime is 12231647. The next prime is 12231671. The reversal of 12231666 is 66613221.

Adding to 12231666 its reverse (66613221), we get a palindrome (78844887).

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 16641 = 3495^2 + 129^2 .

It is a super-2 number, since 2×122316662 = 299227306271112, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339751 + ... + 339786.

Almost surely, 212231666 is an apocalyptic number.

12231666 is an abundant number, since it is smaller than the sum of its proper divisors (14270316).

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

12231666 is a wasteful number, since it uses less digits than its factorization.

12231666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679545 (or 679542 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12231666 is about 3497.3798764218. The cubic root of 12231666 is about 230.4067534551.

The spelling of 12231666 in words is "twelve million, two hundred thirty-one thousand, six hundred sixty-six".

Divisors: 1 2 3 6 9 18 679537 1359074 2038611 4077222 6115833 12231666