231033317 has 2 divisors, whose sum is σ = 231033318. Its totient is φ = 231033316.

The previous prime is 231033301. The next prime is 231033323. The reversal of 231033317 is 713330132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231009601 + 23716 = 15199^2 + 154^2 .

It is a cyclic number.

It is not a de Polignac number, because 231033317 - 2⁴ = 231033301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231033292 and 231033301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231033347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115516658 + 115516659.

It is an arithmetic number, because the mean of its divisors is an integer number (115516659).

Almost surely, 2^231033317 is an apocalyptic number.

It is an amenable number.

231033317 is a deficient number, since it is larger than the sum of its proper divisors (1).

231033317 is an equidigital number, since it uses as much as digits as its factorization.

231033317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 231033317 is about 15199.7801628839. The cubic root of 231033317 is about 613.6087412778.

Adding to 231033317 its reverse (713330132), we get a palindrome (944363449).

The spelling of 231033317 in words is "two hundred thirty-one million, thirty-three thousand, three hundred seventeen".