231244313 has 4 divisors (see below), whose sum is σ = 232418340. Its totient is φ = 230070288.

The previous prime is 231244303. The next prime is 231244327. The reversal of 231244313 is 313442132.

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 221176384 + 10067929 = 14872^2 + 3173^2 .

It is a cyclic number.

It is not a de Polignac number, because 231244313 - 2⁶ = 231244249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231244303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586718 + ... + 587111.

It is an arithmetic number, because the mean of its divisors is an integer number (58104585).

Almost surely, 2^231244313 is an apocalyptic number.

It is an amenable number.

231244313 is a deficient number, since it is larger than the sum of its proper divisors (1174027).

231244313 is a wasteful number, since it uses less digits than its factorization.

231244313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174026.

The product of its digits is 1728, while the sum is 23.

The square root of 231244313 is about 15206.7193371878. The cubic root of 231244313 is about 613.7954814389.

Adding to 231244313 its reverse (313442132), we get a palindrome (544686445).

The spelling of 231244313 in words is "two hundred thirty-one million, two hundred forty-four thousand, three hundred thirteen".