57171955 has 4 divisors (see below), whose sum is σ = 68606352. Its totient is φ = 45737560.

The previous prime is 57171953. The next prime is 57171991. The reversal of 57171955 is 55917175.

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

It is not a de Polignac number, because 57171955 - 2¹ = 57171953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57171953) 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 3 ways as a sum of consecutive naturals, for example, 5717191 + ... + 5717200.

It is an arithmetic number, because the mean of its divisors is an integer number (17151588).

Almost surely, 2^57171955 is an apocalyptic number.

57171955 is a deficient number, since it is larger than the sum of its proper divisors (11434397).

57171955 is a wasteful number, since it uses less digits than its factorization.

57171955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11434396.

The product of its digits is 55125, while the sum is 40.

The square root of 57171955 is about 7561.2138575760. The cubic root of 57171955 is about 385.2367240401.

The spelling of 57171955 in words is "fifty-seven million, one hundred seventy-one thousand, nine hundred fifty-five".