231241013 has 4 divisors (see below), whose sum is σ = 231595788. Its totient is φ = 230886240.

The previous prime is 231241007. The next prime is 231241027. The reversal of 231241013 is 310142132.

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 18722929 + 212518084 = 4327^2 + 14578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231241013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231240982 and 231241000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231241063) 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, 176408 + ... + 177713.

It is an arithmetic number, because the mean of its divisors is an integer number (57898947).

Almost surely, 2^231241013 is an apocalyptic number.

It is an amenable number.

231241013 is a deficient number, since it is larger than the sum of its proper divisors (354775).

231241013 is an equidigital number, since it uses as much as digits as its factorization.

231241013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354774.

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

The square root of 231241013 is about 15206.6108321348. The cubic root of 231241013 is about 613.7925616774.

Adding to 231241013 its reverse (310142132), we get a palindrome (541383145).

The spelling of 231241013 in words is "two hundred thirty-one million, two hundred forty-one thousand, thirteen".