231322323221137 has 2 divisors, whose sum is σ = 231322323221138. Its totient is φ = 231322323221136.

The previous prime is 231322323221131. The next prime is 231322323221167. The reversal of 231322323221137 is 731122323223132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149783427868816 + 81538895352321 = 12238604^2 + 9029889^2 .

It is a cyclic number.

It is not a de Polignac number, because 231322323221137 - 2²³ = 231322314832529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231322323221096 and 231322323221105.

It is not a weakly prime, because it can be changed into another prime (231322323221131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661161610568 + 115661161610569.

It is an arithmetic number, because the mean of its divisors is an integer number (115661161610569).

Almost surely, 2^{231322323221137} is an apocalyptic number.

It is an amenable number.

231322323221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

231322323221137 is an equidigital number, since it uses as much as digits as its factorization.

231322323221137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 37.

Adding to 231322323221137 its reverse (731122323223132), we get a palindrome (962444646444269).

The spelling of 231322323221137 in words is "two hundred thirty-one trillion, three hundred twenty-two billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred thirty-seven".