57171919 has 16 divisors (see below), whose sum is σ = 67765248. Its totient is φ = 47211552.

The previous prime is 57171913. The next prime is 57171953. The reversal of 57171919 is 91917175.

It is a cyclic number.

It is not a de Polignac number, because 57171919 - 2⁵ = 57171887 is a prime.

It is a super-2 number, since 2×57171919² = 6537256644285122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57171913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26682 + ... + 28744.

It is an arithmetic number, because the mean of its divisors is an integer number (4235328).

Almost surely, 2^57171919 is an apocalyptic number.

57171919 is a deficient number, since it is larger than the sum of its proper divisors (10593329).

57171919 is a wasteful number, since it uses less digits than its factorization.

57171919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214.

The product of its digits is 19845, while the sum is 40.

The square root of 57171919 is about 7561.2114770055. The cubic root of 57171919 is about 385.2366431815.

The spelling of 57171919 in words is "fifty-seven million, one hundred seventy-one thousand, nine hundred nineteen".