231217841 has 8 divisors (see below), whose sum is σ = 239564520. Its totient is φ = 222896128.

The previous prime is 231217823. The next prime is 231217849. The reversal of 231217841 is 148712132.

It can be written as a sum of positive squares in 4 ways, for example, as 133287025 + 97930816 = 11545^2 + 9896^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 231217841 - 2¹⁴ = 231201457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231217849) 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 7 ways as a sum of consecutive naturals, for example, 13745 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (29945565).

Almost surely, 2^231217841 is an apocalyptic number.

It is an amenable number.

231217841 is a deficient number, since it is larger than the sum of its proper divisors (8346679).

231217841 is a wasteful number, since it uses less digits than its factorization.

231217841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483.

The product of its digits is 2688, while the sum is 29.

The square root of 231217841 is about 15205.8489075750. The cubic root of 231217841 is about 613.7720588607.

Adding to 231217841 its reverse (148712132), we get a palindrome (379929973).

The spelling of 231217841 in words is "two hundred thirty-one million, two hundred seventeen thousand, eight hundred forty-one".