231189144 has 32 divisors (see below), whose sum is σ = 582199920. Its totient is φ = 76499456.

The previous prime is 231189139. The next prime is 231189151. The reversal of 231189144 is 441981132.

It is a happy number.

231189144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31869 + ... + 38444.

Almost surely, 2^231189144 is an apocalyptic number.

231189144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231189144 is an abundant number, since it is smaller than the sum of its proper divisors (351010776).

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

231189144 is a wasteful number, since it uses less digits than its factorization.

231189144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70459 (or 70455 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 231189144 is about 15204.9052611320. The cubic root of 231189144 is about 613.7466655701.

The spelling of 231189144 in words is "two hundred thirty-one million, one hundred eighty-nine thousand, one hundred forty-four".