47145171 has 4 divisors (see below), whose sum is σ = 62860232. Its totient is φ = 31430112.

The previous prime is 47145151. The next prime is 47145173. The reversal of 47145171 is 17154174.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 47145171 - 2⁹ = 47144659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47145173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7857526 + ... + 7857531.

It is an arithmetic number, because the mean of its divisors is an integer number (15715058).

Almost surely, 2^47145171 is an apocalyptic number.

47145171 is a deficient number, since it is larger than the sum of its proper divisors (15715061).

47145171 is a wasteful number, since it uses less digits than its factorization.

47145171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15715060.

The product of its digits is 3920, while the sum is 30.

The square root of 47145171 is about 6866.2341206807. The cubic root of 47145171 is about 361.2537841983.

The spelling of 47145171 in words is "forty-seven million, one hundred forty-five thousand, one hundred seventy-one".