171422543 has 4 divisors (see below), whose sum is σ = 181506240. Its totient is φ = 161338848.

The previous prime is 171422521. The next prime is 171422549. The reversal of 171422543 is 345224171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345224171 = 37 ⋅9330383.

It is a cyclic number.

It is not a de Polignac number, because 171422543 - 2⁶ = 171422479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171422549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5041823 + ... + 5041856.

It is an arithmetic number, because the mean of its divisors is an integer number (45376560).

Almost surely, 2^171422543 is an apocalyptic number.

171422543 is a deficient number, since it is larger than the sum of its proper divisors (10083697).

171422543 is a wasteful number, since it uses less digits than its factorization.

171422543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10083696.

The product of its digits is 6720, while the sum is 29.

The square root of 171422543 is about 13092.8431977168. The cubic root of 171422543 is about 555.5067125163.

The spelling of 171422543 in words is "one hundred seventy-one million, four hundred twenty-two thousand, five hundred forty-three".