57255217 has 4 divisors (see below), whose sum is σ = 57606640. Its totient is φ = 56903796.

The previous prime is 57255203. The next prime is 57255221. The reversal of 57255217 is 71255275.

57255217 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57255217 - 2⁷ = 57255089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57255277) 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, 175467 + ... + 175792.

It is an arithmetic number, because the mean of its divisors is an integer number (14401660).

Almost surely, 2^57255217 is an apocalyptic number.

It is an amenable number.

57255217 is a deficient number, since it is larger than the sum of its proper divisors (351423).

57255217 is a wasteful number, since it uses less digits than its factorization.

57255217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351422.

The product of its digits is 24500, while the sum is 34.

The square root of 57255217 is about 7566.7177164210. The cubic root of 57255217 is about 385.4236456504.

The spelling of 57255217 in words is "fifty-seven million, two hundred fifty-five thousand, two hundred seventeen".