231545520540143 has 2 divisors, whose sum is σ = 231545520540144. Its totient is φ = 231545520540142.

The previous prime is 231545520540133. The next prime is 231545520540211. The reversal of 231545520540143 is 341045025545132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231545520540143 - 2⁸ = 231545520539887 is a prime.

It is a super-2 number, since 2×231545520540143² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231545520540094 and 231545520540103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231545520540133) 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, 115772760270071 + 115772760270072.

It is an arithmetic number, because the mean of its divisors is an integer number (115772760270072).

Almost surely, 2^{231545520540143} is an apocalyptic number.

231545520540143 is a deficient number, since it is larger than the sum of its proper divisors (1).

231545520540143 is an equidigital number, since it uses as much as digits as its factorization.

231545520540143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440000, while the sum is 44.

The spelling of 231545520540143 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred twenty million, five hundred forty thousand, one hundred forty-three".