57218563 has 2 divisors, whose sum is σ = 57218564. Its totient is φ = 57218562.

The previous prime is 57218561. The next prime is 57218597. The reversal of 57218563 is 36581275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57218563 - 2¹ = 57218561 is a prime.

Together with 57218561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57218561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28609281 + 28609282.

It is an arithmetic number, because the mean of its divisors is an integer number (28609282).

Almost surely, 2^57218563 is an apocalyptic number.

57218563 is a deficient number, since it is larger than the sum of its proper divisors (1).

57218563 is an equidigital number, since it uses as much as digits as its factorization.

57218563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 57218563 is about 7564.2952745117. The cubic root of 57218563 is about 385.3413804594.

The spelling of 57218563 in words is "fifty-seven million, two hundred eighteen thousand, five hundred sixty-three".