56218 has 4 divisors (see below), whose sum is σ = 84330. Its totient is φ = 28108.

The previous prime is 56209. The next prime is 56237. The reversal of 56218 is 81265.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81265 = 5 ⋅16253.

It can be written as a sum of positive squares in only one way, i.e., 56169 + 49 = 237^2 + 7^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14053 + ... + 14056.

2⁵⁶²¹⁸ is an apocalyptic number.

56218 is a deficient number, since it is larger than the sum of its proper divisors (28112).

56218 is a wasteful number, since it uses less digits than its factorization.

56218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28111.

The product of its digits is 480, while the sum is 22.

The square root of 56218 is about 237.1033529919. The cubic root of 56218 is about 38.3082044927.

The spelling of 56218 in words is "fifty-six thousand, two hundred eighteen".