203142423173 has 2 divisors, whose sum is σ = 203142423174. Its totient is φ = 203142423172.

The previous prime is 203142423149. The next prime is 203142423181. The reversal of 203142423173 is 371324241302.

203142423173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126666945409 + 76475477764 = 355903^2 + 276542^2 .

It is a cyclic number.

It is not a de Polignac number, because 203142423173 - 2⁶ = 203142423109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203142423073) 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, 101571211586 + 101571211587.

It is an arithmetic number, because the mean of its divisors is an integer number (101571211587).

Almost surely, 2^203142423173 is an apocalyptic number.

It is an amenable number.

203142423173 is a deficient number, since it is larger than the sum of its proper divisors (1).

203142423173 is an equidigital number, since it uses as much as digits as its factorization.

203142423173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 32.

Adding to 203142423173 its reverse (371324241302), we get a palindrome (574466664475).

The spelling of 203142423173 in words is "two hundred three billion, one hundred forty-two million, four hundred twenty-three thousand, one hundred seventy-three".