57171243 has 4 divisors (see below), whose sum is σ = 76228328. Its totient is φ = 38114160.

The previous prime is 57171239. The next prime is 57171251. The reversal of 57171243 is 34217175.

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

It is not a de Polignac number, because 57171243 - 2² = 57171239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57171243.

It is not an unprimeable number, because it can be changed into a prime (57171143) 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, 9528538 + ... + 9528543.

It is an arithmetic number, because the mean of its divisors is an integer number (19057082).

Almost surely, 2^57171243 is an apocalyptic number.

57171243 is a deficient number, since it is larger than the sum of its proper divisors (19057085).

57171243 is a wasteful number, since it uses less digits than its factorization.

57171243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19057084.

The product of its digits is 5880, while the sum is 30.

The square root of 57171243 is about 7561.1667750421. The cubic root of 57171243 is about 385.2351248313.

The spelling of 57171243 in words is "fifty-seven million, one hundred seventy-one thousand, two hundred forty-three".