57172271 has 4 divisors (see below), whose sum is σ = 61570152. Its totient is φ = 52774392.

The previous prime is 57172261. The next prime is 57172301. The reversal of 57172271 is 17227175.

57172271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 57172271 - 2¹⁸ = 56910127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57172201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198921 + ... + 2198946.

It is an arithmetic number, because the mean of its divisors is an integer number (15392538).

Almost surely, 2^57172271 is an apocalyptic number.

57172271 is a deficient number, since it is larger than the sum of its proper divisors (4397881).

57172271 is a wasteful number, since it uses less digits than its factorization.

57172271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397880.

The product of its digits is 6860, while the sum is 32.

The square root of 57172271 is about 7561.2347536629. The cubic root of 57172271 is about 385.2374337971.

The spelling of 57172271 in words is "fifty-seven million, one hundred seventy-two thousand, two hundred seventy-one".