231243141 has 4 divisors (see below), whose sum is σ = 308324192. Its totient is φ = 154162092.

The previous prime is 231243139. The next prime is 231243151. The reversal of 231243141 is 141342132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 231243141 - 2¹ = 231243139 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 (231243151) 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, 38540521 + ... + 38540526.

It is an arithmetic number, because the mean of its divisors is an integer number (77081048).

Almost surely, 2^231243141 is an apocalyptic number.

It is an amenable number.

231243141 is a deficient number, since it is larger than the sum of its proper divisors (77081051).

231243141 is an equidigital number, since it uses as much as digits as its factorization.

231243141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77081050.

The product of its digits is 576, while the sum is 21.

The square root of 231243141 is about 15206.6808015425. The cubic root of 231243141 is about 613.7944444844.

Adding to 231243141 its reverse (141342132), we get a palindrome (372585273).

The spelling of 231243141 in words is "two hundred thirty-one million, two hundred forty-three thousand, one hundred forty-one".