312231132 has 96 divisors (see below), whose sum is σ = 841881600. Its totient is φ = 99964800.

The previous prime is 312231131. The next prime is 312231167. The reversal of 312231132 is 231132213.

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 (312231131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 599032 + ... + 599552.

It is an arithmetic number, because the mean of its divisors is an integer number (8769600).

Almost surely, 2^312231132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312231132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420940800).

312231132 is an abundant number, since it is smaller than the sum of its proper divisors (529650468).

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

312231132 is a wasteful number, since it uses less digits than its factorization.

312231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 736 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 312231132 is about 17670.0631577819. The cubic root of 312231132 is about 678.4097296307.

Adding to 312231132 its reverse (231132213), we get a palindrome (543363345).

The spelling of 312231132 in words is "three hundred twelve million, two hundred thirty-one thousand, one hundred thirty-two".