231440141 has 8 divisors (see below), whose sum is σ = 239289600. Its totient is φ = 223614720.

The previous prime is 231440129. The next prime is 231440201. The reversal of 231440141 is 141044132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231440141 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 14765 + ... + 26093.

It is an arithmetic number, because the mean of its divisors is an integer number (29911200).

Almost surely, 2^231440141 is an apocalyptic number.

It is an amenable number.

231440141 is a deficient number, since it is larger than the sum of its proper divisors (7849459).

231440141 is a wasteful number, since it uses less digits than its factorization.

231440141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12019.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 231440141 is about 15213.1568387367. The cubic root of 231440141 is about 613.9686956846.

Adding to 231440141 its reverse (141044132), we get a palindrome (372484273).

The spelling of 231440141 in words is "two hundred thirty-one million, four hundred forty thousand, one hundred forty-one".