231440441 has 4 divisors (see below), whose sum is σ = 234610932. Its totient is φ = 228269952.

The previous prime is 231440413. The next prime is 231440497. The reversal of 231440441 is 144044132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165765625 + 65674816 = 12875^2 + 8104^2 .

It is a cyclic number.

It is not a de Polignac number, because 231440441 - 2²⁶ = 164331577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231440401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585136 + ... + 1585281.

It is an arithmetic number, because the mean of its divisors is an integer number (58652733).

Almost surely, 2^231440441 is an apocalyptic number.

It is an amenable number.

231440441 is a deficient number, since it is larger than the sum of its proper divisors (3170491).

231440441 is an equidigital number, since it uses as much as digits as its factorization.

231440441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170490.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 231440441 is about 15213.1666986200. The cubic root of 231440441 is about 613.9689609663.

Adding to 231440441 its reverse (144044132), we get a palindrome (375484573).

The spelling of 231440441 in words is "two hundred thirty-one million, four hundred forty thousand, four hundred forty-one".