231445132 has 24 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 111713280.

The previous prime is 231445129. The next prime is 231445139. The reversal of 231445132 is 231544132.

231445132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231445097 and 231445106.

It is not an unprimeable number, because it can be changed into a prime (231445139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53598 + ... + 57754.

It is an arithmetic number, because the mean of its divisors is an integer number (17463600).

Almost surely, 2^231445132 is an apocalyptic number.

It is an amenable number.

231445132 is a deficient number, since it is larger than the sum of its proper divisors (187681268).

231445132 is a wasteful number, since it uses less digits than its factorization.

231445132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641 (or 4639 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 231445132 is about 15213.3208734977. The cubic root of 231445132 is about 613.9731090587.

Adding to 231445132 its reverse (231544132), we get a palindrome (462989264).

The spelling of 231445132 in words is "two hundred thirty-one million, four hundred forty-five thousand, one hundred thirty-two".