12231432 has 64 divisors (see below), whose sum is σ = 35985600. Its totient is φ = 3836160.

The previous prime is 12231431. The next prime is 12231433. The reversal of 12231432 is 23413221.

12231432 is a `hidden beast` number, since 1 + 2 + 231 + 432 = 666.

It is an interprime number because it is at equal distance from previous prime (12231431) and next prime (12231433).

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 not an unprimeable number, because it can be changed into a prime (12231431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2007 + ... + 5337.

It is an arithmetic number, because the mean of its divisors is an integer number (562275).

Almost surely, 2^12231432 is an apocalyptic number.

12231432 is a gapful number since it is divisible by the number (12) 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 12231432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17992800).

12231432 is an abundant number, since it is smaller than the sum of its proper divisors (23754168).

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

12231432 is a wasteful number, since it uses less digits than its factorization.

12231432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3353 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12231432 is about 3497.3464226467. The cubic root of 12231432 is about 230.4052841670.

Adding to 12231432 its reverse (23413221), we get a palindrome (35644653).

The spelling of 12231432 in words is "twelve million, two hundred thirty-one thousand, four hundred thirty-two".