57171213 has 24 divisors (see below), whose sum is σ = 91574496. Its totient is φ = 34077600.

The previous prime is 57171181. The next prime is 57171217. The reversal of 57171213 is 31217175.

It is a happy number.

57171213 is a `hidden beast` number, since 571 + 71 + 21 + 3 = 666.

57171213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57171213 - 2⁵ = 57171181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57171217) 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 23 ways as a sum of consecutive naturals, for example, 1306 + ... + 10772.

It is an arithmetic number, because the mean of its divisors is an integer number (3815604).

Almost surely, 2^57171213 is an apocalyptic number.

It is an amenable number.

57171213 is a deficient number, since it is larger than the sum of its proper divisors (34403283).

57171213 is a wasteful number, since it uses less digits than its factorization.

57171213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9545 (or 9542 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 57171213 is about 7561.1647912210. The cubic root of 57171213 is about 385.2350574486.

Adding to 57171213 its reverse (31217175), we get a palindrome (88388388).

The spelling of 57171213 in words is "fifty-seven million, one hundred seventy-one thousand, two hundred thirteen".