231311441 has 4 divisors (see below), whose sum is σ = 231448500. Its totient is φ = 231174384.

The previous prime is 231311417. The next prime is 231311467. The reversal of 231311441 is 144113132.

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 49843600 + 181467841 = 7060^2 + 13471^2 .

It is a cyclic number.

It is not a de Polignac number, because 231311441 - 2¹⁸ = 231049297 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231310441) 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, 65966 + ... + 69383.

It is an arithmetic number, because the mean of its divisors is an integer number (57862125).

Almost surely, 2^231311441 is an apocalyptic number.

It is an amenable number.

231311441 is a deficient number, since it is larger than the sum of its proper divisors (137059).

231311441 is a wasteful number, since it uses less digits than its factorization.

231311441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137058.

The product of its digits is 288, while the sum is 20.

The square root of 231311441 is about 15208.9263592142. The cubic root of 231311441 is about 613.8548686678.

Adding to 231311441 its reverse (144113132), we get a palindrome (375424573).

The spelling of 231311441 in words is "two hundred thirty-one million, three hundred eleven thousand, four hundred forty-one".