231040541 has 4 divisors (see below), whose sum is σ = 231511584. Its totient is φ = 230569500.

The previous prime is 231040531. The next prime is 231040571. The reversal of 231040541 is 145040132.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231040541 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 (231040501) 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, 234785 + ... + 235766.

It is an arithmetic number, because the mean of its divisors is an integer number (57877896).

Almost surely, 2^231040541 is an apocalyptic number.

It is an amenable number.

231040541 is a deficient number, since it is larger than the sum of its proper divisors (471043).

231040541 is an equidigital number, since it uses as much as digits as its factorization.

231040541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471042.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 231040541 is about 15200.0177960422. The cubic root of 231040541 is about 613.6151366950.

Adding to 231040541 its reverse (145040132), we get a palindrome (376080673).

The spelling of 231040541 in words is "two hundred thirty-one million, forty thousand, five hundred forty-one".