57211717 has 8 divisors (see below), whose sum is σ = 61211360. Its totient is φ = 53310960.

The previous prime is 57211697. The next prime is 57211733. The reversal of 57211717 is 71711275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-57211717 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 (57212717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23523 + ... + 25840.

It is an arithmetic number, because the mean of its divisors is an integer number (7651420).

Almost surely, 2^57211717 is an apocalyptic number.

It is an amenable number.

57211717 is a deficient number, since it is larger than the sum of its proper divisors (3999643).

57211717 is a wasteful number, since it uses less digits than its factorization.

57211717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49443.

The product of its digits is 3430, while the sum is 31.

The square root of 57211717 is about 7563.8427403007. The cubic root of 57211717 is about 385.3260115991.

The spelling of 57211717 in words is "fifty-seven million, two hundred eleven thousand, seven hundred seventeen".