231045520109 has 2 divisors, whose sum is σ = 231045520110. Its totient is φ = 231045520108.

The previous prime is 231045520093. The next prime is 231045520117. The reversal of 231045520109 is 901025540132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185282898025 + 45762622084 = 430445^2 + 213922^2 .

It is a cyclic number.

It is not a de Polignac number, because 231045520109 - 2⁴ = 231045520093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231045520009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115522760054 + 115522760055.

It is an arithmetic number, because the mean of its divisors is an integer number (115522760055).

Almost surely, 2^231045520109 is an apocalyptic number.

It is an amenable number.

231045520109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231045520109 is an equidigital number, since it uses as much as digits as its factorization.

231045520109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 231045520109 in words is "two hundred thirty-one billion, forty-five million, five hundred twenty thousand, one hundred nine".