231443404010309 has 2 divisors, whose sum is σ = 231443404010310. Its totient is φ = 231443404010308.

The previous prime is 231443404010297. The next prime is 231443404010381. The reversal of 231443404010309 is 903010404344132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126160003017409 + 105283400992900 = 11232097^2 + 10260770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231443404010309 is a prime.

It is a super-2 number, since 2×231443404010309² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231443404010909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115721702005154 + 115721702005155.

It is an arithmetic number, because the mean of its divisors is an integer number (115721702005155).

Almost surely, 2^{231443404010309} is an apocalyptic number.

It is an amenable number.

231443404010309 is a deficient number, since it is larger than the sum of its proper divisors (1).

231443404010309 is an equidigital number, since it uses as much as digits as its factorization.

231443404010309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 231443404010309 in words is "two hundred thirty-one trillion, four hundred forty-three billion, four hundred four million, ten thousand, three hundred nine".