231144424213 has 2 divisors, whose sum is σ = 231144424214. Its totient is φ = 231144424212.

The previous prime is 231144424201. The next prime is 231144424319. The reversal of 231144424213 is 312424441132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197582917009 + 33561507204 = 444503^2 + 183198^2 .

It is a cyclic number.

It is not a de Polignac number, because 231144424213 - 2²⁹ = 230607553301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231144424913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115572212106 + 115572212107.

It is an arithmetic number, because the mean of its divisors is an integer number (115572212107).

Almost surely, 2^231144424213 is an apocalyptic number.

It is an amenable number.

231144424213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231144424213 is an equidigital number, since it uses as much as digits as its factorization.

231144424213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 31.

Adding to 231144424213 its reverse (312424441132), we get a palindrome (543568865345).

The spelling of 231144424213 in words is "two hundred thirty-one billion, one hundred forty-four million, four hundred twenty-four thousand, two hundred thirteen".