231533531053109 has 2 divisors, whose sum is σ = 231533531053110. Its totient is φ = 231533531053108.

The previous prime is 231533531053073. The next prime is 231533531053171. The reversal of 231533531053109 is 901350135335132.

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., 137305313530225 + 94228217522884 = 11717735^2 + 9707122^2 .

It is a cyclic number.

It is not a de Polignac number, because 231533531053109 - 2¹⁶ = 231533530987573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231533531053109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231533531050109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115766765526554 + 115766765526555.

It is an arithmetic number, because the mean of its divisors is an integer number (115766765526555).

Almost surely, 2^{231533531053109} is an apocalyptic number.

It is an amenable number.

231533531053109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231533531053109 is an equidigital number, since it uses as much as digits as its factorization.

231533531053109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 546750, while the sum is 44.

The spelling of 231533531053109 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-one million, fifty-three thousand, one hundred nine".