171540243 has 12 divisors (see below), whose sum is σ = 283177648. Its totient is φ = 98022960.

The previous prime is 171540223. The next prime is 171540253. The reversal of 171540243 is 342045171.

It is not a de Polignac number, because 171540243 - 2⁵ = 171540211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171540203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1361368 + ... + 1361493.

Almost surely, 2^171540243 is an apocalyptic number.

171540243 is a deficient number, since it is larger than the sum of its proper divisors (111637405).

171540243 is a wasteful number, since it uses less digits than its factorization.

171540243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722874 (or 2722871 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 171540243 is about 13097.3372484639. The cubic root of 171540243 is about 555.6338217838.

The spelling of 171540243 in words is "one hundred seventy-one million, five hundred forty thousand, two hundred forty-three".