203422543 has 2 divisors, whose sum is σ = 203422544. Its totient is φ = 203422542.

The previous prime is 203422537. The next prime is 203422547. The reversal of 203422543 is 345224302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203422543 - 2¹⁷ = 203291471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203422547) 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, 101711271 + 101711272.

It is an arithmetic number, because the mean of its divisors is an integer number (101711272).

Almost surely, 2^203422543 is an apocalyptic number.

203422543 is a deficient number, since it is larger than the sum of its proper divisors (1).

203422543 is an equidigital number, since it uses as much as digits as its factorization.

203422543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 203422543 is about 14262.6274928570. The cubic root of 203422543 is about 588.1205567900.

Adding to 203422543 its reverse (345224302), we get a palindrome (548646845).

It can be divided in two parts, 20342 and 2543, that multiplied together give a triangular number (51729706 = T₁₀₁₇₁).

The spelling of 203422543 in words is "two hundred three million, four hundred twenty-two thousand, five hundred forty-three".