312223232 has 40 divisors (see below), whose sum is σ = 625871400. Its totient is φ = 155602944.

The previous prime is 312223211. The next prime is 312223237. The reversal of 312223232 is 232322213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312223237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193244 + ... + 194852.

It is an arithmetic number, because the mean of its divisors is an integer number (15646785).

Almost surely, 2^312223232 is an apocalyptic number.

312223232 is a gapful number since it is divisible by the number (32) 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 312223232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312935700).

312223232 is an abundant number, since it is smaller than the sum of its proper divisors (313648168).

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

312223232 is an equidigital number, since it uses as much as digits as its factorization.

312223232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1990 counting only the distinct ones).

The product of its digits is 864, while the sum is 20.

The square root of 312223232 is about 17669.8396144391. The cubic root of 312223232 is about 678.4040079270.

Adding to 312223232 its reverse (232322213), we get a palindrome (544545445).

The spelling of 312223232 in words is "three hundred twelve million, two hundred twenty-three thousand, two hundred thirty-two".