231243101 has 4 divisors (see below), whose sum is σ = 231359100. Its totient is φ = 231127104.

The previous prime is 231243097. The next prime is 231243109. The reversal of 231243101 is 101342132.

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 228765625 + 2477476 = 15125^2 + 1574^2 .

It is a cyclic number.

It is not a de Polignac number, because 231243101 - 2² = 231243097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231243101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231243109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54956 + ... + 59013.

It is an arithmetic number, because the mean of its divisors is an integer number (57839775).

Almost surely, 2^231243101 is an apocalyptic number.

It is an amenable number.

231243101 is a deficient number, since it is larger than the sum of its proper divisors (115999).

231243101 is a wasteful number, since it uses less digits than its factorization.

231243101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115998.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231243101 is about 15206.6794863310. The cubic root of 231243101 is about 613.7944090934.

Adding to 231243101 its reverse (101342132), we get a palindrome (332585233).

The spelling of 231243101 in words is "two hundred thirty-one million, two hundred forty-three thousand, one hundred one".