23131232309 has 2 divisors, whose sum is σ = 23131232310. Its totient is φ = 23131232308.

The previous prime is 23131232281. The next prime is 23131232321. The reversal of 23131232309 is 90323213132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22287504100 + 843728209 = 149290^2 + 29047^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131232309 - 2¹² = 23131228213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23131232209) 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, 11565616154 + 11565616155.

It is an arithmetic number, because the mean of its divisors is an integer number (11565616155).

Almost surely, 2^23131232309 is an apocalyptic number.

It is an amenable number.

23131232309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131232309 is an equidigital number, since it uses as much as digits as its factorization.

23131232309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 23131232309 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty-two thousand, three hundred nine".