57091217 has 4 divisors (see below), whose sum is σ = 57213936. Its totient is φ = 56968500.

The previous prime is 57091207. The next prime is 57091249. The reversal of 57091217 is 71219075.

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 57091217 - 2⁸ = 57090961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57091207) 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, 60659 + ... + 61592.

It is an arithmetic number, because the mean of its divisors is an integer number (14303484).

Almost surely, 2^57091217 is an apocalyptic number.

It is an amenable number.

57091217 is a deficient number, since it is larger than the sum of its proper divisors (122719).

57091217 is a wasteful number, since it uses less digits than its factorization.

57091217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122718.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 57091217 is about 7555.8730137556. The cubic root of 57091217 is about 385.0552953693.

The spelling of 57091217 in words is "fifty-seven million, ninety-one thousand, two hundred seventeen".