171385475 has 6 divisors (see below), whose sum is σ = 212518020. Its totient is φ = 137108360.

The previous prime is 171385457. The next prime is 171385477. The reversal of 171385475 is 574583171.

It is a happy number.

It is not a de Polignac number, because 171385475 - 2²⁰ = 170336899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171385477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3427685 + ... + 3427734.

It is an arithmetic number, because the mean of its divisors is an integer number (35419670).

Almost surely, 2^171385475 is an apocalyptic number.

171385475 is a deficient number, since it is larger than the sum of its proper divisors (41132545).

171385475 is an equidigital number, since it uses as much as digits as its factorization.

171385475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855429 (or 6855424 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 171385475 is about 13091.4275386606. The cubic root of 171385475 is about 555.4666691497.

The spelling of 171385475 in words is "one hundred seventy-one million, three hundred eighty-five thousand, four hundred seventy-five".