23231131031209 has 2 divisors, whose sum is σ = 23231131031210. Its totient is φ = 23231131031208.

The previous prime is 23231131031203. The next prime is 23231131031237. The reversal of 23231131031209 is 90213013113232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16409004944809 + 6822126086400 = 4050803^2 + 2611920^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231131031209 - 2³ = 23231131031201 is a prime.

It is not a weakly prime, because it can be changed into another prime (23231131031201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11615565515604 + 11615565515605.

It is an arithmetic number, because the mean of its divisors is an integer number (11615565515605).

Almost surely, 2^{23231131031209} is an apocalyptic number.

It is an amenable number.

23231131031209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23231131031209 is an equidigital number, since it uses as much as digits as its factorization.

23231131031209 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 31.

The spelling of 23231131031209 in words is "twenty-three trillion, two hundred thirty-one billion, one hundred thirty-one million, thirty-one thousand, two hundred nine".