231231132 has 96 divisors (see below), whose sum is σ = 658828800. Its totient is φ = 69552000.

The previous prime is 231231131. The next prime is 231231151. The reversal of 231231132 is 231132132.

231231132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (231231131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178744 + ... + 180032.

It is an arithmetic number, because the mean of its divisors is an integer number (6862800).

Almost surely, 2^231231132 is an apocalyptic number.

231231132 is a gapful number since it is divisible by the number (22) 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 231231132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329414400).

231231132 is an abundant number, since it is smaller than the sum of its proper divisors (427597668).

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

231231132 is a wasteful number, since it uses less digits than its factorization.

231231132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1456 counting only the distinct ones).

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

The square root of 231231132 is about 15206.2859370722. The cubic root of 231231132 is about 613.7838190376.

Adding to 231231132 its reverse (231132132), we get a palindrome (462363264).

The spelling of 231231132 in words is "two hundred thirty-one million, two hundred thirty-one thousand, one hundred thirty-two".