57856971 has 4 divisors (see below), whose sum is σ = 77142632. Its totient is φ = 38571312.

The previous prime is 57856951. The next prime is 57856991. The reversal of 57856971 is 17965875.

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

It is an interprime number because it is at equal distance from previous prime (57856951) and next prime (57856991).

It is not a de Polignac number, because 57856971 - 2⁹ = 57856459 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 57856971.

It is not an unprimeable number, because it can be changed into a prime (57856901) 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, 9642826 + ... + 9642831.

It is an arithmetic number, because the mean of its divisors is an integer number (19285658).

Almost surely, 2^57856971 is an apocalyptic number.

57856971 is a deficient number, since it is larger than the sum of its proper divisors (19285661).

57856971 is a wasteful number, since it uses less digits than its factorization.

57856971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19285660.

The product of its digits is 529200, while the sum is 48.

The square root of 57856971 is about 7606.3769956531. The cubic root of 57856971 is about 386.7692138668.

The spelling of 57856971 in words is "fifty-seven million, eight hundred fifty-six thousand, nine hundred seventy-one".