171545057 has 4 divisors (see below), whose sum is σ = 171677616. Its totient is φ = 171412500.

The previous prime is 171545029. The next prime is 171545069. The reversal of 171545057 is 750545171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171545057 - 2²² = 167350753 is a prime.

It is a super-2 number, since 2×171545057² = 58855413162266498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171548057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64319 + ... + 66932.

It is an arithmetic number, because the mean of its divisors is an integer number (42919404).

Almost surely, 2^171545057 is an apocalyptic number.

It is an amenable number.

171545057 is a deficient number, since it is larger than the sum of its proper divisors (132559).

171545057 is a wasteful number, since it uses less digits than its factorization.

171545057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132558.

The product of its (nonzero) digits is 24500, while the sum is 35.

The square root of 171545057 is about 13097.5210249879. The cubic root of 171545057 is about 555.6390193906.

The spelling of 171545057 in words is "one hundred seventy-one million, five hundred forty-five thousand, fifty-seven".