231203231209 has 2 divisors, whose sum is σ = 231203231210. Its totient is φ = 231203231208.

The previous prime is 231203231197. The next prime is 231203231267. The reversal of 231203231209 is 902132302132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142089040809 + 89114190400 = 376947^2 + 298520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231203231209 is a prime.

It is not a weakly prime, because it can be changed into another prime (231203235209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115601615604 + 115601615605.

It is an arithmetic number, because the mean of its divisors is an integer number (115601615605).

Almost surely, 2^231203231209 is an apocalyptic number.

It is an amenable number.

231203231209 is a deficient number, since it is larger than the sum of its proper divisors (1).

231203231209 is an equidigital number, since it uses as much as digits as its factorization.

231203231209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 231203231209 in words is "two hundred thirty-one billion, two hundred three million, two hundred thirty-one thousand, two hundred nine".