231443144 has 16 divisors (see below), whose sum is σ = 435271920. Its totient is φ = 115370640.

The previous prime is 231443141. The next prime is 231443153. The reversal of 231443144 is 441344132.

231443144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231443141) 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, 41054 + ... + 46349.

It is an arithmetic number, because the mean of its divisors is an integer number (27204495).

Almost surely, 2^231443144 is an apocalyptic number.

It is an amenable number.

231443144 is a deficient number, since it is larger than the sum of its proper divisors (203828776).

231443144 is a wasteful number, since it uses less digits than its factorization.

231443144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87740 (or 87736 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 231443144 is about 15213.2555358805. The cubic root of 231443144 is about 613.9713511445.

Adding to 231443144 its reverse (441344132), we get a palindrome (672787276).

The spelling of 231443144 in words is "two hundred thirty-one million, four hundred forty-three thousand, one hundred forty-four".