57211517 has 8 divisors (see below), whose sum is σ = 62566560. Its totient is φ = 51882160.

The previous prime is 57211481. The next prime is 57211559. The reversal of 57211517 is 71511275.

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

It is not a de Polignac number, because 57211517 - 2¹⁰ = 57210493 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 57211517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57211597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (7820820).

Almost surely, 2^57211517 is an apocalyptic number.

It is an amenable number.

57211517 is a deficient number, since it is larger than the sum of its proper divisors (5355043).

57211517 is a wasteful number, since it uses less digits than its factorization.

57211517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12843.

The product of its digits is 2450, while the sum is 29.

The square root of 57211517 is about 7563.8295194961. The cubic root of 57211517 is about 385.3255625926.

The spelling of 57211517 in words is "fifty-seven million, two hundred eleven thousand, five hundred seventeen".