231440541 has 8 divisors (see below), whose sum is σ = 308845824. Its totient is φ = 154164480.

The previous prime is 231440509. The next prime is 231440581. The reversal of 231440541 is 145044132.

231440541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 231440541 - 2⁵ = 231440509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231440581) 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, 28045 + ... + 35346.

It is an arithmetic number, because the mean of its divisors is an integer number (38605728).

Almost surely, 2^231440541 is an apocalyptic number.

It is an amenable number.

231440541 is a deficient number, since it is larger than the sum of its proper divisors (77405283).

231440541 is a wasteful number, since it uses less digits than its factorization.

231440541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64611.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 231440541 is about 15213.1699852463. The cubic root of 231440541 is about 613.9690493935.

Adding to 231440541 its reverse (145044132), we get a palindrome (376484673).

The spelling of 231440541 in words is "two hundred thirty-one million, four hundred forty thousand, five hundred forty-one".