23311031309 has 2 divisors, whose sum is σ = 23311031310. Its totient is φ = 23311031308.

The previous prime is 23311031291. The next prime is 23311031351. The reversal of 23311031309 is 90313011332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20480472100 + 2830559209 = 143110^2 + 53203^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311031309 - 2³² = 19016064013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23311031209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655515654 + 11655515655.

It is an arithmetic number, because the mean of its divisors is an integer number (11655515655).

Almost surely, 2^23311031309 is an apocalyptic number.

It is an amenable number.

23311031309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311031309 is an equidigital number, since it uses as much as digits as its factorization.

23311031309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 23311031309 in words is "twenty-three billion, three hundred eleven million, thirty-one thousand, three hundred nine".