231321113 has 2 divisors, whose sum is σ = 231321114. Its totient is φ = 231321112.

The previous prime is 231321107. The next prime is 231321121. The reversal of 231321113 is 311123132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151093264 + 80227849 = 12292^2 + 8957^2 .

It is a cyclic number.

It is not a de Polignac number, because 231321113 - 2⁶ = 231321049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231321091 and 231321100.

It is not a weakly prime, because it can be changed into another prime (231321173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660556 + 115660557.

It is an arithmetic number, because the mean of its divisors is an integer number (115660557).

Almost surely, 2^231321113 is an apocalyptic number.

It is an amenable number.

231321113 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321113 is an equidigital number, since it uses as much as digits as its factorization.

231321113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 231321113 is about 15209.2443270532. The cubic root of 231321113 is about 613.8634244076.

Adding to 231321113 its reverse (311123132), we get a palindrome (542444245).

The spelling of 231321113 in words is "two hundred thirty-one million, three hundred twenty-one thousand, one hundred thirteen".