231123853 has 2 divisors, whose sum is σ = 231123854. Its totient is φ = 231123852.

The previous prime is 231123829. The next prime is 231123877. The reversal of 231123853 is 358321132.

It is the 6207-th star number.

It is a balanced prime because it is at equal distance from previous prime (231123829) and next prime (231123877).

It can be written as a sum of positive squares in only one way, i.e., 223741764 + 7382089 = 14958^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 231123853 - 2⁹ = 231123341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231123953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561926 + 115561927.

It is an arithmetic number, because the mean of its divisors is an integer number (115561927).

Almost surely, 2^231123853 is an apocalyptic number.

It is an amenable number.

231123853 is a deficient number, since it is larger than the sum of its proper divisors (1).

231123853 is an equidigital number, since it uses as much as digits as its factorization.

231123853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 231123853 is about 15202.7580721394. The cubic root of 231123853 is about 613.6888832917.

Adding to 231123853 its reverse (358321132), we get a palindrome (589444985).

The spelling of 231123853 in words is "two hundred thirty-one million, one hundred twenty-three thousand, eight hundred fifty-three".