57218194 has 16 divisors (see below), whose sum is σ = 93838176. Its totient is φ = 25950400.

The previous prime is 57218191. The next prime is 57218207. The reversal of 57218194 is 49181275.

It is not an unprimeable number, because it can be changed into a prime (57218191) 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 in 7 ways as a sum of consecutive naturals, for example, 8154 + ... + 13450.

It is an arithmetic number, because the mean of its divisors is an integer number (5864886).

Almost surely, 2^57218194 is an apocalyptic number.

57218194 is a deficient number, since it is larger than the sum of its proper divisors (36619982).

57218194 is a wasteful number, since it uses less digits than its factorization.

57218194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801.

The product of its digits is 20160, while the sum is 37.

The square root of 57218194 is about 7564.2708835684. The cubic root of 57218194 is about 385.3405521078.

It can be divided in two parts, 572181 and 94, that added together give a palindrome (572275).

The spelling of 57218194 in words is "fifty-seven million, two hundred eighteen thousand, one hundred ninety-four".