231310144 has 28 divisors (see below), whose sum is σ = 494316004. Its totient is φ = 106758144.

The previous prime is 231310117. The next prime is 231310159. The reversal of 231310144 is 441013132.

231310144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65415744 + 165894400 = 8088^2 + 12880^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138177 + ... + 139840.

It is an arithmetic number, because the mean of its divisors is an integer number (17654143).

Almost surely, 2^231310144 is an apocalyptic number.

It is an amenable number.

231310144 is an abundant number, since it is smaller than the sum of its proper divisors (263005860).

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

231310144 is a wasteful number, since it uses less digits than its factorization.

231310144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278042 (or 278032 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231310144 is about 15208.8837197212. The cubic root of 231310144 is about 613.8537213384.

Adding to 231310144 its reverse (441013132), we get a palindrome (672323276).

The spelling of 231310144 in words is "two hundred thirty-one million, three hundred ten thousand, one hundred forty-four".